Esempio n. 1
0
    def get_doc(self, descriptor):
        """Get the documentation of the object in the given `descriptor`

        Parameters
        ----------
        descriptor: instance of :attr:`object_descriptor`
            The descriptor containig the information on the specific object

        Returns
        -------
        str
            The header and documentation of the object in the descriptor

        Notes
        -----
        This method uses the :func:`IPython.core.oinspect.getdoc` function to
        get the documentation and the :func:`IPython.core.oinspect.signature`
        function to get the signature. Those function (different from the
        inspect module) do not fail when the object is not saved"""
        obj = descriptor.obj
        oname = descriptor.name
        sig = ''
        obj_sig = obj
        if callable(obj):
            if inspect.isclass(obj):
                oname = oname or obj.__name__
                obj_sig = getattr(obj, '__init__', obj)
            elif six.PY2 and type(obj) is types.InstanceType:
                obj_sig = getattr(obj, '__call__', obj)

            try:
                sig = str(signature(obj_sig))
                sig = re.sub('^\(\s*self,\s*', '(', sig)
            except:
                logger.debug('Failed to get signature from %s!' % (obj, ),
                             exc_info=True)
        oname = oname or type(oname).__name__
        head = self.header(descriptor, sig)
        lines = []
        ds = getdoc(obj)
        if ds:
            lines.append('')
            lines.append(ds)
        if inspect.isclass(obj) and hasattr(obj, '__init__'):
            init_ds = getdoc(obj.__init__)
            if init_ds is not None:
                lines.append('\n' + init_ds)
        elif hasattr(obj, '__call__'):
            call_ds = getdoc(obj.__call__)
            if call_ds and call_ds != getdoc(object.__call__):
                lines.append('\n' + call_ds)
        doc = self.process_docstring(lines, descriptor)
        return head + '\n' + doc
Esempio n. 2
0
    def get_doc(self, descriptor):
        """Get the documentation of the object in the given `descriptor`

        Parameters
        ----------
        descriptor: instance of :attr:`object_descriptor`
            The descriptor containig the information on the specific object

        Returns
        -------
        str
            The header and documentation of the object in the descriptor

        Notes
        -----
        This method uses the :func:`IPython.core.oinspect.getdoc` function to
        get the documentation and the :func:`IPython.core.oinspect.signature`
        function to get the signature. Those function (different from the
        inspect module) do not fail when the object is not saved"""
        obj = descriptor.obj
        oname = descriptor.name
        sig = ''
        obj_sig = obj
        if callable(obj):
            if inspect.isclass(obj):
                oname = oname or obj.__name__
                obj_sig = getattr(obj, '__init__', obj)
            elif six.PY2 and type(obj) is types.InstanceType:
                obj_sig = getattr(obj, '__call__', obj)

            try:
                sig = str(signature(obj_sig))
                sig = re.sub('^\(\s*self,\s*', '(', sig)
            except:
                logger.debug('Failed to get signature from %s!' % (obj, ),
                             exc_info=True)
        oname = oname or type(oname).__name__
        head = self.header(descriptor, sig)
        lines = []
        ds = getdoc(obj)
        if ds:
            lines.append('')
            lines.append(ds)
        if inspect.isclass(obj) and hasattr(obj, '__init__'):
            init_ds = getdoc(obj.__init__)
            if init_ds is not None:
                lines.append('\n' + init_ds)
        elif hasattr(obj, '__call__'):
            call_ds = getdoc(obj.__call__)
            if call_ds and call_ds != getdoc(object.__call__):
                lines.append('\n' + call_ds)
        doc = self.process_docstring(lines, descriptor)
        return head + '\n' + doc
Esempio n. 3
0
    def plugin_pinfo(self, runner, detail_level=0):
        """Generate info dict for a plugin from a plugin runner."""
        plugin_class = getattr(
            runner.session.plugins, runner.plugin_name)._target

        display_fields = [
            ("file", oinspect.find_file(plugin_class)),
            ("Plugin", "%s (%s)" % (plugin_class.__name__, plugin_class.name))]
        if getattr(plugin_class, "table_header", None):
            display_fields.append(
                ("", "This is a Typed Plugin."))

        display_fields += [
            ("Positional Args",
             self.format_parameters(plugin_class, True)),
            ("Keyword Args",
             self.format_parameters(plugin_class, False)),
            ("Docstring", oinspect.getdoc(plugin_class) or ""),
            ("Link", (
                "http://www.rekall-forensic.com/epydocs/%s.%s-class.html" % (
                    plugin_class.__module__, plugin_class.__name__))),
        ]

        # Include the source if required.
        if detail_level > 0:
            info = self.info(plugin_class, detail_level=detail_level)
            display_fields.append(("source", self.format(info["source"])))

        return self._format_fields(display_fields)
Esempio n. 4
0
    def plugin_pinfo(self, runner, detail_level=0):
        """Generate info dict for a plugin from a plugin runner."""
        plugin_class = getattr(runner.session.plugins,
                               runner.plugin_name)._target

        display_fields = [
            ("file", oinspect.find_file(plugin_class)),
            ("Plugin", "%s (%s)" % (plugin_class.__name__, plugin_class.name))
        ]
        if getattr(plugin_class, "table_header", None):
            display_fields.append(("", "This is a Typed Plugin."))

        display_fields += [
            ("Positional Args", self.format_parameters(plugin_class, True)),
            ("Keyword Args", self.format_parameters(plugin_class, False)),
            ("Docstring", oinspect.getdoc(plugin_class) or ""),
            ("Link",
             ("http://www.rekall-forensic.com/epydocs/%s.%s-class.html" %
              (plugin_class.__module__, plugin_class.__name__))),
        ]

        # Include the source if required.
        if detail_level > 0:
            info = self.info(plugin_class, detail_level=detail_level)
            display_fields.append(("source", self.format(info["source"])))

        return self._format_fields(display_fields)
Esempio n. 5
0
    def plugin_info(self, runner, **kwargs):
        """Generate info dict for a plugin from a plugin runner."""
        plugin_class = getattr(
            runner.session.plugins, runner.plugin_name)._target

        result = oinspect.Inspector.info(self, plugin_class, **kwargs)
        result["file"] = oinspect.find_file(plugin_class)
        result["type_name"] = "Rekall Plugin (%s)" % plugin_class.__name__
        result["parameters"] = self.format_parameters(plugin_class)
        result["docstring"] = oinspect.getdoc(plugin_class)
        result["link"] = (
            "http://www.rekall-forensic.com/epydocs/%s.%s-class.html" % (
                plugin_class.__module__, plugin_class.__name__))

        # Hide these two fields.
        result["init_definition"] = None
        result["string_form"] = None

        return result
Esempio n. 6
0
    def alias(self, parameter_s=''):
        """Define an alias for a system command.

        '%alias alias_name cmd' defines 'alias_name' as an alias for 'cmd'

        Then, typing 'alias_name params' will execute the system command 'cmd
        params' (from your underlying operating system).

        Aliases have lower precedence than magic functions and Python normal
        variables, so if 'foo' is both a Python variable and an alias, the
        alias can not be executed until 'del foo' removes the Python variable.

        You can use the %l specifier in an alias definition to represent the
        whole line when the alias is called.  For example::

          In [2]: alias bracket echo "Input in brackets: <%l>"
          In [3]: bracket hello world
          Input in brackets: <hello world>

        You can also define aliases with parameters using %s specifiers (one
        per parameter)::

          In [1]: alias parts echo first %s second %s
          In [2]: %parts A B
          first A second B
          In [3]: %parts A
          Incorrect number of arguments: 2 expected.
          parts is an alias to: 'echo first %s second %s'

        Note that %l and %s are mutually exclusive.  You can only use one or
        the other in your aliases.

        Aliases expand Python variables just like system calls using ! or !!
        do: all expressions prefixed with '$' get expanded.  For details of
        the semantic rules, see PEP-215:
        http://www.python.org/peps/pep-0215.html.  This is the library used by
        IPython for variable expansion.  If you want to access a true shell
        variable, an extra $ is necessary to prevent its expansion by
        IPython::

          In [6]: alias show echo
          In [7]: PATH='A Python string'
          In [8]: show $PATH
          A Python string
          In [9]: show $$PATH
          /usr/local/lf9560/bin:/usr/local/intel/compiler70/ia32/bin:...

        You can use the alias facility to acess all of $PATH.  See the %rehash
        and %rehashx functions, which automatically create aliases for the
        contents of your $PATH.

        If called with no parameters, %alias prints the current alias table."""

        par = parameter_s.strip()
        if not par:
            aliases = sorted(self.shell.alias_manager.aliases)
            # stored = self.shell.db.get('stored_aliases', {} )
            # for k, v in stored:
            #     atab.append(k, v[0])

            print("Total number of aliases:", len(aliases))
            sys.stdout.flush()
            return aliases

        # Now try to define a new one
        try:
            alias,cmd = par.split(None, 1)
        except:
            print(oinspect.getdoc(self.alias))
        else:
            self.shell.alias_manager.soft_define_alias(alias, cmd)
Esempio n. 7
0
    def run(self, parameter_s='', runner=None,
                  file_finder=get_py_filename):
        """Run the named file inside IPython as a program.

        Usage:\\
          %run [-n -i -t [-N<N>] -d [-b<N>] -p [profile options] -G] file [args]

        Parameters after the filename are passed as command-line arguments to
        the program (put in sys.argv). Then, control returns to IPython's
        prompt.

        This is similar to running at a system prompt:\\
          $ python file args\\
        but with the advantage of giving you IPython's tracebacks, and of
        loading all variables into your interactive namespace for further use
        (unless -p is used, see below).

        The file is executed in a namespace initially consisting only of
        __name__=='__main__' and sys.argv constructed as indicated. It thus
        sees its environment as if it were being run as a stand-alone program
        (except for sharing global objects such as previously imported
        modules). But after execution, the IPython interactive namespace gets
        updated with all variables defined in the program (except for __name__
        and sys.argv). This allows for very convenient loading of code for
        interactive work, while giving each program a 'clean sheet' to run in.

        Arguments are expanded using shell-like glob match.  Patterns
        '*', '?', '[seq]' and '[!seq]' can be used.  Additionally,
        tilde '~' will be expanded into user's home directory.  Unlike
        real shells, quotation does not suppress expansions.  Use
        *two* back slashes (e.g., '\\\\*') to suppress expansions.
        To completely disable these expansions, you can use -G flag.

        Options:

        -n: __name__ is NOT set to '__main__', but to the running file's name
        without extension (as python does under import).  This allows running
        scripts and reloading the definitions in them without calling code
        protected by an ' if __name__ == "__main__" ' clause.

        -i: run the file in IPython's namespace instead of an empty one. This
        is useful if you are experimenting with code written in a text editor
        which depends on variables defined interactively.

        -e: ignore sys.exit() calls or SystemExit exceptions in the script
        being run.  This is particularly useful if IPython is being used to
        run unittests, which always exit with a sys.exit() call.  In such
        cases you are interested in the output of the test results, not in
        seeing a traceback of the unittest module.

        -t: print timing information at the end of the run.  IPython will give
        you an estimated CPU time consumption for your script, which under
        Unix uses the resource module to avoid the wraparound problems of
        time.clock().  Under Unix, an estimate of time spent on system tasks
        is also given (for Windows platforms this is reported as 0.0).

        If -t is given, an additional -N<N> option can be given, where <N>
        must be an integer indicating how many times you want the script to
        run.  The final timing report will include total and per run results.

        For example (testing the script uniq_stable.py)::

            In [1]: run -t uniq_stable

            IPython CPU timings (estimated):\\
              User  :    0.19597 s.\\
              System:        0.0 s.\\

            In [2]: run -t -N5 uniq_stable

            IPython CPU timings (estimated):\\
            Total runs performed: 5\\
              Times :      Total       Per run\\
              User  :   0.910862 s,  0.1821724 s.\\
              System:        0.0 s,        0.0 s.

        -d: run your program under the control of pdb, the Python debugger.
        This allows you to execute your program step by step, watch variables,
        etc.  Internally, what IPython does is similar to calling:

          pdb.run('execfile("YOURFILENAME")')

        with a breakpoint set on line 1 of your file.  You can change the line
        number for this automatic breakpoint to be <N> by using the -bN option
        (where N must be an integer).  For example::

          %run -d -b40 myscript

        will set the first breakpoint at line 40 in myscript.py.  Note that
        the first breakpoint must be set on a line which actually does
        something (not a comment or docstring) for it to stop execution.

        Or you can specify a breakpoint in a different file::

          %run -d -b myotherfile.py:20 myscript

        When the pdb debugger starts, you will see a (Pdb) prompt.  You must
        first enter 'c' (without quotes) to start execution up to the first
        breakpoint.

        Entering 'help' gives information about the use of the debugger.  You
        can easily see pdb's full documentation with "import pdb;pdb.help()"
        at a prompt.

        -p: run program under the control of the Python profiler module (which
        prints a detailed report of execution times, function calls, etc).

        You can pass other options after -p which affect the behavior of the
        profiler itself. See the docs for %prun for details.

        In this mode, the program's variables do NOT propagate back to the
        IPython interactive namespace (because they remain in the namespace
        where the profiler executes them).

        Internally this triggers a call to %prun, see its documentation for
        details on the options available specifically for profiling.

        There is one special usage for which the text above doesn't apply:
        if the filename ends with .ipy, the file is run as ipython script,
        just as if the commands were written on IPython prompt.

        -m: specify module name to load instead of script path. Similar to
        the -m option for the python interpreter. Use this option last if you
        want to combine with other %run options. Unlike the python interpreter
        only source modules are allowed no .pyc or .pyo files.
        For example::

            %run -m example

        will run the example module.

        -G: disable shell-like glob expansion of arguments.

        """

        # get arguments and set sys.argv for program to be run.
        opts, arg_lst = self.parse_options(parameter_s,
                                           'nidtN:b:pD:l:rs:T:em:G',
                                           mode='list', list_all=1)
        if "m" in opts:
            modulename = opts["m"][0]
            modpath = find_mod(modulename)
            if modpath is None:
                warn('%r is not a valid modulename on sys.path'%modulename)
                return
            arg_lst = [modpath] + arg_lst
        try:
            filename = file_finder(arg_lst[0])
        except IndexError:
            warn('you must provide at least a filename.')
            print '\n%run:\n', oinspect.getdoc(self.run)
            return
        except IOError as e:
            try:
                msg = str(e)
            except UnicodeError:
                msg = e.message
            error(msg)
            return

        if filename.lower().endswith('.ipy'):
            with preserve_keys(self.shell.user_ns, '__file__'):
                self.shell.user_ns['__file__'] = filename
                self.shell.safe_execfile_ipy(filename)
            return

        # Control the response to exit() calls made by the script being run
        exit_ignore = 'e' in opts

        # Make sure that the running script gets a proper sys.argv as if it
        # were run from a system shell.
        save_argv = sys.argv # save it for later restoring

        if 'G' in opts:
            args = arg_lst[1:]
        else:
            # tilde and glob expansion
            args = shellglob(map(os.path.expanduser,  arg_lst[1:]))

        sys.argv = [filename] + args  # put in the proper filename
        # protect sys.argv from potential unicode strings on Python 2:
        if not py3compat.PY3:
            sys.argv = [ py3compat.cast_bytes(a) for a in sys.argv ]

        if 'i' in opts:
            # Run in user's interactive namespace
            prog_ns = self.shell.user_ns
            __name__save = self.shell.user_ns['__name__']
            prog_ns['__name__'] = '__main__'
            main_mod = self.shell.new_main_mod(prog_ns)
        else:
            # Run in a fresh, empty namespace
            if 'n' in opts:
                name = os.path.splitext(os.path.basename(filename))[0]
            else:
                name = '__main__'

            main_mod = self.shell.new_main_mod()
            prog_ns = main_mod.__dict__
            prog_ns['__name__'] = name

        # Since '%run foo' emulates 'python foo.py' at the cmd line, we must
        # set the __file__ global in the script's namespace
        prog_ns['__file__'] = filename

        # pickle fix.  See interactiveshell for an explanation.  But we need to
        # make sure that, if we overwrite __main__, we replace it at the end
        main_mod_name = prog_ns['__name__']

        if main_mod_name == '__main__':
            restore_main = sys.modules['__main__']
        else:
            restore_main = False

        # This needs to be undone at the end to prevent holding references to
        # every single object ever created.
        sys.modules[main_mod_name] = main_mod

        try:
            stats = None
            with self.shell.readline_no_record:
                if 'p' in opts:
                    stats = self.prun('', None, False, opts, arg_lst, prog_ns)
                else:
                    if 'd' in opts:
                        deb = debugger.Pdb(self.shell.colors)
                        # reset Breakpoint state, which is moronically kept
                        # in a class
                        bdb.Breakpoint.next = 1
                        bdb.Breakpoint.bplist = {}
                        bdb.Breakpoint.bpbynumber = [None]
                        # Set an initial breakpoint to stop execution
                        maxtries = 10
                        bp_file, bp_line = parse_breakpoint(opts.get('b', [1])[0], filename)
                        checkline = deb.checkline(bp_file, bp_line)
                        if not checkline:
                            for bp in range(bp_line + 1, bp_line + maxtries + 1):
                                if deb.checkline(bp_file, bp):
                                    break
                            else:
                                msg = ("\nI failed to find a valid line to set "
                                       "a breakpoint\n"
                                       "after trying up to line: %s.\n"
                                       "Please set a valid breakpoint manually "
                                       "with the -b option." % bp)
                                error(msg)
                                return
                        # if we find a good linenumber, set the breakpoint
                        deb.do_break('%s:%s' % (bp_file, bp_line))

                        # Mimic Pdb._runscript(...)
                        deb._wait_for_mainpyfile = True
                        deb.mainpyfile = deb.canonic(filename)

                        # Start file run
                        print "NOTE: Enter 'c' at the",
                        print "%s prompt to start your script." % deb.prompt
                        ns = {'execfile': py3compat.execfile, 'prog_ns': prog_ns}
                        try:
                            #save filename so it can be used by methods on the deb object
                            deb._exec_filename = filename
                            deb.run('execfile("%s", prog_ns)' % filename, ns)

                        except:
                            etype, value, tb = sys.exc_info()
                            # Skip three frames in the traceback: the %run one,
                            # one inside bdb.py, and the command-line typed by the
                            # user (run by exec in pdb itself).
                            self.shell.InteractiveTB(etype, value, tb, tb_offset=3)
                    else:
                        if runner is None:
                            runner = self.default_runner
                        if runner is None:
                            runner = self.shell.safe_execfile
                        if 't' in opts:
                            # timed execution
                            try:
                                nruns = int(opts['N'][0])
                                if nruns < 1:
                                    error('Number of runs must be >=1')
                                    return
                            except (KeyError):
                                nruns = 1
                            twall0 = time.time()
                            if nruns == 1:
                                t0 = clock2()
                                runner(filename, prog_ns, prog_ns,
                                       exit_ignore=exit_ignore)
                                t1 = clock2()
                                t_usr = t1[0] - t0[0]
                                t_sys = t1[1] - t0[1]
                                print "\nIPython CPU timings (estimated):"
                                print "  User   : %10.2f s." % t_usr
                                print "  System : %10.2f s." % t_sys
                            else:
                                runs = range(nruns)
                                t0 = clock2()
                                for nr in runs:
                                    runner(filename, prog_ns, prog_ns,
                                           exit_ignore=exit_ignore)
                                t1 = clock2()
                                t_usr = t1[0] - t0[0]
                                t_sys = t1[1] - t0[1]
                                print "\nIPython CPU timings (estimated):"
                                print "Total runs performed:", nruns
                                print "  Times  : %10.2f    %10.2f" % ('Total', 'Per run')
                                print "  User   : %10.2f s, %10.2f s." % (t_usr, t_usr / nruns)
                                print "  System : %10.2f s, %10.2f s." % (t_sys, t_sys / nruns)
                            twall1 = time.time()
                            print "Wall time: %10.2f s." % (twall1 - twall0)

                        else:
                            # regular execution
                            runner(filename, prog_ns, prog_ns, exit_ignore=exit_ignore)

                if 'i' in opts:
                    self.shell.user_ns['__name__'] = __name__save
                else:
                    # The shell MUST hold a reference to prog_ns so after %run
                    # exits, the python deletion mechanism doesn't zero it out
                    # (leaving dangling references).
                    self.shell.cache_main_mod(prog_ns, filename)
                    # update IPython interactive namespace

                    # Some forms of read errors on the file may mean the
                    # __name__ key was never set; using pop we don't have to
                    # worry about a possible KeyError.
                    prog_ns.pop('__name__', None)

                    with preserve_keys(self.shell.user_ns, '__file__'):
                        self.shell.user_ns.update(prog_ns)
        finally:
            # It's a bit of a mystery why, but __builtins__ can change from
            # being a module to becoming a dict missing some key data after
            # %run.  As best I can see, this is NOT something IPython is doing
            # at all, and similar problems have been reported before:
            # http://coding.derkeiler.com/Archive/Python/comp.lang.python/2004-10/0188.html
            # Since this seems to be done by the interpreter itself, the best
            # we can do is to at least restore __builtins__ for the user on
            # exit.
            self.shell.user_ns['__builtins__'] = builtin_mod

            # Ensure key global structures are restored
            sys.argv = save_argv
            if restore_main:
                sys.modules['__main__'] = restore_main
            else:
                # Remove from sys.modules the reference to main_mod we'd
                # added.  Otherwise it will trap references to objects
                # contained therein.
                del sys.modules[main_mod_name]

        return stats
 def arg_err(self,func):
     """Print docstring if incorrect arguments were passed"""
     print('Error in arguments:')
     print(oinspect.getdoc(func))
Esempio n. 9
0
    def alias(self, parameter_s=''):
        """Define an alias for a system command.

        '%alias alias_name cmd' defines 'alias_name' as an alias for 'cmd'

        Then, typing 'alias_name params' will execute the system command 'cmd
        params' (from your underlying operating system).

        Aliases have lower precedence than magic functions and Python normal
        variables, so if 'foo' is both a Python variable and an alias, the
        alias can not be executed until 'del foo' removes the Python variable.

        You can use the %l specifier in an alias definition to represent the
        whole line when the alias is called.  For example::

          In [2]: alias bracket echo "Input in brackets: <%l>"
          In [3]: bracket hello world
          Input in brackets: <hello world>

        You can also define aliases with parameters using %s specifiers (one
        per parameter)::

          In [1]: alias parts echo first %s second %s
          In [2]: %parts A B
          first A second B
          In [3]: %parts A
          Incorrect number of arguments: 2 expected.
          parts is an alias to: 'echo first %s second %s'

        Note that %l and %s are mutually exclusive.  You can only use one or
        the other in your aliases.

        Aliases expand Python variables just like system calls using ! or !!
        do: all expressions prefixed with '$' get expanded.  For details of
        the semantic rules, see PEP-215:
        http://www.python.org/peps/pep-0215.html.  This is the library used by
        IPython for variable expansion.  If you want to access a true shell
        variable, an extra $ is necessary to prevent its expansion by
        IPython::

          In [6]: alias show echo
          In [7]: PATH='A Python string'
          In [8]: show $PATH
          A Python string
          In [9]: show $$PATH
          /usr/local/lf9560/bin:/usr/local/intel/compiler70/ia32/bin:...

        You can use the alias facility to access all of $PATH.  See the %rehashx
        function, which automatically creates aliases for the contents of your
        $PATH.

        If called with no parameters, %alias prints the current alias table
        for your system.  For posix systems, the default aliases are 'cat',
        'cp', 'mv', 'rm', 'rmdir', and 'mkdir', and other platform-specific
        aliases are added.  For windows-based systems, the default aliases are
        'copy', 'ddir', 'echo', 'ls', 'ldir', 'mkdir', 'ren', and 'rmdir'.

        You can see the definition of alias by adding a question mark in the
        end::

          In [1]: cat?
          Repr: <alias cat for 'cat'>"""

        par = parameter_s.strip()
        if not par:
            aliases = sorted(self.shell.alias_manager.aliases)
            # stored = self.shell.db.get('stored_aliases', {} )
            # for k, v in stored:
            #     atab.append(k, v[0])

            print("Total number of aliases:", len(aliases))
            sys.stdout.flush()
            return aliases

        # Now try to define a new one
        try:
            alias, cmd = par.split(None, 1)
        except TypeError:
            print(oinspect.getdoc(self.alias))
            return

        try:
            self.shell.alias_manager.define_alias(alias, cmd)
        except AliasError as e:
            print(e)
Esempio n. 10
0
    def run(self, parameter_s='', runner=None, file_finder=get_py_filename):
        """Run the named file inside IPython as a program.

        Usage::
        
          %run [-n -i -e -G]
               [( -t [-N<N>] | -d [-b<N>] | -p [profile options] )]
               ( -m mod | file ) [args]

        Parameters after the filename are passed as command-line arguments to
        the program (put in sys.argv). Then, control returns to IPython's
        prompt.

        This is similar to running at a system prompt ``python file args``,
        but with the advantage of giving you IPython's tracebacks, and of
        loading all variables into your interactive namespace for further use
        (unless -p is used, see below).

        The file is executed in a namespace initially consisting only of
        ``__name__=='__main__'`` and sys.argv constructed as indicated. It thus
        sees its environment as if it were being run as a stand-alone program
        (except for sharing global objects such as previously imported
        modules). But after execution, the IPython interactive namespace gets
        updated with all variables defined in the program (except for __name__
        and sys.argv). This allows for very convenient loading of code for
        interactive work, while giving each program a 'clean sheet' to run in.

        Arguments are expanded using shell-like glob match.  Patterns
        '*', '?', '[seq]' and '[!seq]' can be used.  Additionally,
        tilde '~' will be expanded into user's home directory.  Unlike
        real shells, quotation does not suppress expansions.  Use
        *two* back slashes (e.g. ``\\\\*``) to suppress expansions.
        To completely disable these expansions, you can use -G flag.

        Options:

        -n
          __name__ is NOT set to '__main__', but to the running file's name
          without extension (as python does under import).  This allows running
          scripts and reloading the definitions in them without calling code
          protected by an ``if __name__ == "__main__"`` clause.

        -i
          run the file in IPython's namespace instead of an empty one. This
          is useful if you are experimenting with code written in a text editor
          which depends on variables defined interactively.

        -e
          ignore sys.exit() calls or SystemExit exceptions in the script
          being run.  This is particularly useful if IPython is being used to
          run unittests, which always exit with a sys.exit() call.  In such
          cases you are interested in the output of the test results, not in
          seeing a traceback of the unittest module.

        -t
          print timing information at the end of the run.  IPython will give
          you an estimated CPU time consumption for your script, which under
          Unix uses the resource module to avoid the wraparound problems of
          time.clock().  Under Unix, an estimate of time spent on system tasks
          is also given (for Windows platforms this is reported as 0.0).

        If -t is given, an additional ``-N<N>`` option can be given, where <N>
        must be an integer indicating how many times you want the script to
        run.  The final timing report will include total and per run results.

        For example (testing the script uniq_stable.py)::

            In [1]: run -t uniq_stable

            IPython CPU timings (estimated):
              User  :    0.19597 s.
              System:        0.0 s.

            In [2]: run -t -N5 uniq_stable

            IPython CPU timings (estimated):
            Total runs performed: 5
              Times :      Total       Per run
              User  :   0.910862 s,  0.1821724 s.
              System:        0.0 s,        0.0 s.

        -d
          run your program under the control of pdb, the Python debugger.
          This allows you to execute your program step by step, watch variables,
          etc.  Internally, what IPython does is similar to calling::

              pdb.run('execfile("YOURFILENAME")')

          with a breakpoint set on line 1 of your file.  You can change the line
          number for this automatic breakpoint to be <N> by using the -bN option
          (where N must be an integer). For example::

              %run -d -b40 myscript

          will set the first breakpoint at line 40 in myscript.py.  Note that
          the first breakpoint must be set on a line which actually does
          something (not a comment or docstring) for it to stop execution.

          Or you can specify a breakpoint in a different file::

              %run -d -b myotherfile.py:20 myscript

          When the pdb debugger starts, you will see a (Pdb) prompt.  You must
          first enter 'c' (without quotes) to start execution up to the first
          breakpoint.

          Entering 'help' gives information about the use of the debugger.  You
          can easily see pdb's full documentation with "import pdb;pdb.help()"
          at a prompt.

        -p
          run program under the control of the Python profiler module (which
          prints a detailed report of execution times, function calls, etc).

          You can pass other options after -p which affect the behavior of the
          profiler itself. See the docs for %prun for details.

          In this mode, the program's variables do NOT propagate back to the
          IPython interactive namespace (because they remain in the namespace
          where the profiler executes them).

          Internally this triggers a call to %prun, see its documentation for
          details on the options available specifically for profiling.

        There is one special usage for which the text above doesn't apply:
        if the filename ends with .ipy, the file is run as ipython script,
        just as if the commands were written on IPython prompt.

        -m
          specify module name to load instead of script path. Similar to
          the -m option for the python interpreter. Use this option last if you
          want to combine with other %run options. Unlike the python interpreter
          only source modules are allowed no .pyc or .pyo files.
          For example::

              %run -m example

          will run the example module.

        -G
          disable shell-like glob expansion of arguments.

        """

        # get arguments and set sys.argv for program to be run.
        opts, arg_lst = self.parse_options(parameter_s,
                                           'nidtN:b:pD:l:rs:T:em:G',
                                           mode='list',
                                           list_all=1)
        if "m" in opts:
            modulename = opts["m"][0]
            modpath = find_mod(modulename)
            if modpath is None:
                warn('%r is not a valid modulename on sys.path' % modulename)
                return
            arg_lst = [modpath] + arg_lst
        try:
            filename = file_finder(arg_lst[0])
        except IndexError:
            warn('you must provide at least a filename.')
            print '\n%run:\n', oinspect.getdoc(self.run)
            return
        except IOError as e:
            try:
                msg = str(e)
            except UnicodeError:
                msg = e.message
            error(msg)
            return

        if filename.lower().endswith('.ipy'):
            with preserve_keys(self.shell.user_ns, '__file__'):
                self.shell.user_ns['__file__'] = filename
                self.shell.safe_execfile_ipy(filename)
            return

        # Control the response to exit() calls made by the script being run
        exit_ignore = 'e' in opts

        # Make sure that the running script gets a proper sys.argv as if it
        # were run from a system shell.
        save_argv = sys.argv  # save it for later restoring

        if 'G' in opts:
            args = arg_lst[1:]
        else:
            # tilde and glob expansion
            args = shellglob(map(os.path.expanduser, arg_lst[1:]))

        sys.argv = [filename] + args  # put in the proper filename
        # protect sys.argv from potential unicode strings on Python 2:
        if not py3compat.PY3:
            sys.argv = [py3compat.cast_bytes(a) for a in sys.argv]

        if 'i' in opts:
            # Run in user's interactive namespace
            prog_ns = self.shell.user_ns
            __name__save = self.shell.user_ns['__name__']
            prog_ns['__name__'] = '__main__'
            main_mod = self.shell.user_module

            # Since '%run foo' emulates 'python foo.py' at the cmd line, we must
            # set the __file__ global in the script's namespace
            # TK: Is this necessary in interactive mode?
            prog_ns['__file__'] = filename
        else:
            # Run in a fresh, empty namespace
            if 'n' in opts:
                name = os.path.splitext(os.path.basename(filename))[0]
            else:
                name = '__main__'

            # The shell MUST hold a reference to prog_ns so after %run
            # exits, the python deletion mechanism doesn't zero it out
            # (leaving dangling references). See interactiveshell for details
            main_mod = self.shell.new_main_mod(filename, name)
            prog_ns = main_mod.__dict__

        # pickle fix.  See interactiveshell for an explanation.  But we need to
        # make sure that, if we overwrite __main__, we replace it at the end
        main_mod_name = prog_ns['__name__']

        if main_mod_name == '__main__':
            restore_main = sys.modules['__main__']
        else:
            restore_main = False

        # This needs to be undone at the end to prevent holding references to
        # every single object ever created.
        sys.modules[main_mod_name] = main_mod

        if 'p' in opts or 'd' in opts:
            if 'm' in opts:
                code = 'run_module(modulename, prog_ns)'
                code_ns = {
                    'run_module': self.shell.safe_run_module,
                    'prog_ns': prog_ns,
                    'modulename': modulename,
                }
            else:
                code = 'execfile(filename, prog_ns)'
                code_ns = {
                    'execfile': self.shell.safe_execfile,
                    'prog_ns': prog_ns,
                    'filename': get_py_filename(filename),
                }

        try:
            stats = None
            with self.shell.readline_no_record:
                if 'p' in opts:
                    stats = self._run_with_profiler(code, opts, code_ns)
                else:
                    if 'd' in opts:
                        bp_file, bp_line = parse_breakpoint(
                            opts.get('b', ['1'])[0], filename)
                        self._run_with_debugger(code, code_ns, filename,
                                                bp_line, bp_file)
                    else:
                        if 'm' in opts:

                            def run():
                                self.shell.safe_run_module(modulename, prog_ns)
                        else:
                            if runner is None:
                                runner = self.default_runner
                            if runner is None:
                                runner = self.shell.safe_execfile

                            def run():
                                runner(filename,
                                       prog_ns,
                                       prog_ns,
                                       exit_ignore=exit_ignore)

                        if 't' in opts:
                            # timed execution
                            try:
                                nruns = int(opts['N'][0])
                                if nruns < 1:
                                    error('Number of runs must be >=1')
                                    return
                            except (KeyError):
                                nruns = 1
                            self._run_with_timing(run, nruns)
                        else:
                            # regular execution
                            run()

                if 'i' in opts:
                    self.shell.user_ns['__name__'] = __name__save
                else:
                    # update IPython interactive namespace

                    # Some forms of read errors on the file may mean the
                    # __name__ key was never set; using pop we don't have to
                    # worry about a possible KeyError.
                    prog_ns.pop('__name__', None)

                    with preserve_keys(self.shell.user_ns, '__file__'):
                        self.shell.user_ns.update(prog_ns)
        finally:
            # It's a bit of a mystery why, but __builtins__ can change from
            # being a module to becoming a dict missing some key data after
            # %run.  As best I can see, this is NOT something IPython is doing
            # at all, and similar problems have been reported before:
            # http://coding.derkeiler.com/Archive/Python/comp.lang.python/2004-10/0188.html
            # Since this seems to be done by the interpreter itself, the best
            # we can do is to at least restore __builtins__ for the user on
            # exit.
            self.shell.user_ns['__builtins__'] = builtin_mod

            # Ensure key global structures are restored
            sys.argv = save_argv
            if restore_main:
                sys.modules['__main__'] = restore_main
            else:
                # Remove from sys.modules the reference to main_mod we'd
                # added.  Otherwise it will trap references to objects
                # contained therein.
                del sys.modules[main_mod_name]

        return stats
Esempio n. 11
0
    def run(self, parameter_s='', runner=None,
                  file_finder=get_py_filename):
        """Run the named file inside IPython as a program.

        Usage::
        
          %run [-n -i -e -G]
               [( -t [-N<N>] | -d [-b<N>] | -p [profile options] )]
               ( -m mod | file ) [args]

        Parameters after the filename are passed as command-line arguments to
        the program (put in sys.argv). Then, control returns to IPython's
        prompt.

        This is similar to running at a system prompt ``python file args``,
        but with the advantage of giving you IPython's tracebacks, and of
        loading all variables into your interactive namespace for further use
        (unless -p is used, see below).

        The file is executed in a namespace initially consisting only of
        ``__name__=='__main__'`` and sys.argv constructed as indicated. It thus
        sees its environment as if it were being run as a stand-alone program
        (except for sharing global objects such as previously imported
        modules). But after execution, the IPython interactive namespace gets
        updated with all variables defined in the program (except for __name__
        and sys.argv). This allows for very convenient loading of code for
        interactive work, while giving each program a 'clean sheet' to run in.

        Arguments are expanded using shell-like glob match.  Patterns
        '*', '?', '[seq]' and '[!seq]' can be used.  Additionally,
        tilde '~' will be expanded into user's home directory.  Unlike
        real shells, quotation does not suppress expansions.  Use
        *two* back slashes (e.g. ``\\\\*``) to suppress expansions.
        To completely disable these expansions, you can use -G flag.

        Options:

        -n
          __name__ is NOT set to '__main__', but to the running file's name
          without extension (as python does under import).  This allows running
          scripts and reloading the definitions in them without calling code
          protected by an ``if __name__ == "__main__"`` clause.

        -i
          run the file in IPython's namespace instead of an empty one. This
          is useful if you are experimenting with code written in a text editor
          which depends on variables defined interactively.

        -e
          ignore sys.exit() calls or SystemExit exceptions in the script
          being run.  This is particularly useful if IPython is being used to
          run unittests, which always exit with a sys.exit() call.  In such
          cases you are interested in the output of the test results, not in
          seeing a traceback of the unittest module.

        -t
          print timing information at the end of the run.  IPython will give
          you an estimated CPU time consumption for your script, which under
          Unix uses the resource module to avoid the wraparound problems of
          time.clock().  Under Unix, an estimate of time spent on system tasks
          is also given (for Windows platforms this is reported as 0.0).

        If -t is given, an additional ``-N<N>`` option can be given, where <N>
        must be an integer indicating how many times you want the script to
        run.  The final timing report will include total and per run results.

        For example (testing the script uniq_stable.py)::

            In [1]: run -t uniq_stable

            IPython CPU timings (estimated):
              User  :    0.19597 s.
              System:        0.0 s.

            In [2]: run -t -N5 uniq_stable

            IPython CPU timings (estimated):
            Total runs performed: 5
              Times :      Total       Per run
              User  :   0.910862 s,  0.1821724 s.
              System:        0.0 s,        0.0 s.

        -d
          run your program under the control of pdb, the Python debugger.
          This allows you to execute your program step by step, watch variables,
          etc.  Internally, what IPython does is similar to calling::

              pdb.run('execfile("YOURFILENAME")')

          with a breakpoint set on line 1 of your file.  You can change the line
          number for this automatic breakpoint to be <N> by using the -bN option
          (where N must be an integer). For example::

              %run -d -b40 myscript

          will set the first breakpoint at line 40 in myscript.py.  Note that
          the first breakpoint must be set on a line which actually does
          something (not a comment or docstring) for it to stop execution.

          Or you can specify a breakpoint in a different file::

              %run -d -b myotherfile.py:20 myscript

          When the pdb debugger starts, you will see a (Pdb) prompt.  You must
          first enter 'c' (without quotes) to start execution up to the first
          breakpoint.

          Entering 'help' gives information about the use of the debugger.  You
          can easily see pdb's full documentation with "import pdb;pdb.help()"
          at a prompt.

        -p
          run program under the control of the Python profiler module (which
          prints a detailed report of execution times, function calls, etc).

          You can pass other options after -p which affect the behavior of the
          profiler itself. See the docs for %prun for details.

          In this mode, the program's variables do NOT propagate back to the
          IPython interactive namespace (because they remain in the namespace
          where the profiler executes them).

          Internally this triggers a call to %prun, see its documentation for
          details on the options available specifically for profiling.

        There is one special usage for which the text above doesn't apply:
        if the filename ends with .ipy, the file is run as ipython script,
        just as if the commands were written on IPython prompt.

        -m
          specify module name to load instead of script path. Similar to
          the -m option for the python interpreter. Use this option last if you
          want to combine with other %run options. Unlike the python interpreter
          only source modules are allowed no .pyc or .pyo files.
          For example::

              %run -m example

          will run the example module.

        -G
          disable shell-like glob expansion of arguments.

        """

        # get arguments and set sys.argv for program to be run.
        opts, arg_lst = self.parse_options(parameter_s,
                                           'nidtN:b:pD:l:rs:T:em:G',
                                           mode='list', list_all=1)
        if "m" in opts:
            modulename = opts["m"][0]
            modpath = find_mod(modulename)
            if modpath is None:
                warn('%r is not a valid modulename on sys.path'%modulename)
                return
            arg_lst = [modpath] + arg_lst
        try:
            filename = file_finder(arg_lst[0])
        except IndexError:
            warn('you must provide at least a filename.')
            print '\n%run:\n', oinspect.getdoc(self.run)
            return
        except IOError as e:
            try:
                msg = str(e)
            except UnicodeError:
                msg = e.message
            error(msg)
            return

        if filename.lower().endswith('.ipy'):
            with preserve_keys(self.shell.user_ns, '__file__'):
                self.shell.user_ns['__file__'] = filename
                self.shell.safe_execfile_ipy(filename)
            return

        # Control the response to exit() calls made by the script being run
        exit_ignore = 'e' in opts

        # Make sure that the running script gets a proper sys.argv as if it
        # were run from a system shell.
        save_argv = sys.argv # save it for later restoring

        if 'G' in opts:
            args = arg_lst[1:]
        else:
            # tilde and glob expansion
            args = shellglob(map(os.path.expanduser,  arg_lst[1:]))

        sys.argv = [filename] + args  # put in the proper filename
        # protect sys.argv from potential unicode strings on Python 2:
        if not py3compat.PY3:
            sys.argv = [ py3compat.cast_bytes(a) for a in sys.argv ]

        if 'i' in opts:
            # Run in user's interactive namespace
            prog_ns = self.shell.user_ns
            __name__save = self.shell.user_ns['__name__']
            prog_ns['__name__'] = '__main__'
            main_mod = self.shell.user_module
            
            # Since '%run foo' emulates 'python foo.py' at the cmd line, we must
            # set the __file__ global in the script's namespace
            # TK: Is this necessary in interactive mode?
            prog_ns['__file__'] = filename
        else:
            # Run in a fresh, empty namespace
            if 'n' in opts:
                name = os.path.splitext(os.path.basename(filename))[0]
            else:
                name = '__main__'

            # The shell MUST hold a reference to prog_ns so after %run
            # exits, the python deletion mechanism doesn't zero it out
            # (leaving dangling references). See interactiveshell for details
            main_mod = self.shell.new_main_mod(filename, name)
            prog_ns = main_mod.__dict__

        # pickle fix.  See interactiveshell for an explanation.  But we need to
        # make sure that, if we overwrite __main__, we replace it at the end
        main_mod_name = prog_ns['__name__']

        if main_mod_name == '__main__':
            restore_main = sys.modules['__main__']
        else:
            restore_main = False

        # This needs to be undone at the end to prevent holding references to
        # every single object ever created.
        sys.modules[main_mod_name] = main_mod

        if 'p' in opts or 'd' in opts:
            if 'm' in opts:
                code = 'run_module(modulename, prog_ns)'
                code_ns = {
                    'run_module': self.shell.safe_run_module,
                    'prog_ns': prog_ns,
                    'modulename': modulename,
                }
            else:
                code = 'execfile(filename, prog_ns)'
                code_ns = {
                    'execfile': self.shell.safe_execfile,
                    'prog_ns': prog_ns,
                    'filename': get_py_filename(filename),
                }

        try:
            stats = None
            with self.shell.readline_no_record:
                if 'p' in opts:
                    stats = self._run_with_profiler(code, opts, code_ns)
                else:
                    if 'd' in opts:
                        bp_file, bp_line = parse_breakpoint(
                            opts.get('b', ['1'])[0], filename)
                        self._run_with_debugger(
                            code, code_ns, filename, bp_line, bp_file)
                    else:
                        if 'm' in opts:
                            def run():
                                self.shell.safe_run_module(modulename, prog_ns)
                        else:
                            if runner is None:
                                runner = self.default_runner
                            if runner is None:
                                runner = self.shell.safe_execfile

                            def run():
                                runner(filename, prog_ns, prog_ns,
                                       exit_ignore=exit_ignore)

                        if 't' in opts:
                            # timed execution
                            try:
                                nruns = int(opts['N'][0])
                                if nruns < 1:
                                    error('Number of runs must be >=1')
                                    return
                            except (KeyError):
                                nruns = 1
                            self._run_with_timing(run, nruns)
                        else:
                            # regular execution
                            run()

                if 'i' in opts:
                    self.shell.user_ns['__name__'] = __name__save
                else:
                    # update IPython interactive namespace

                    # Some forms of read errors on the file may mean the
                    # __name__ key was never set; using pop we don't have to
                    # worry about a possible KeyError.
                    prog_ns.pop('__name__', None)

                    with preserve_keys(self.shell.user_ns, '__file__'):
                        self.shell.user_ns.update(prog_ns)
        finally:
            # It's a bit of a mystery why, but __builtins__ can change from
            # being a module to becoming a dict missing some key data after
            # %run.  As best I can see, this is NOT something IPython is doing
            # at all, and similar problems have been reported before:
            # http://coding.derkeiler.com/Archive/Python/comp.lang.python/2004-10/0188.html
            # Since this seems to be done by the interpreter itself, the best
            # we can do is to at least restore __builtins__ for the user on
            # exit.
            self.shell.user_ns['__builtins__'] = builtin_mod

            # Ensure key global structures are restored
            sys.argv = save_argv
            if restore_main:
                sys.modules['__main__'] = restore_main
            else:
                # Remove from sys.modules the reference to main_mod we'd
                # added.  Otherwise it will trap references to objects
                # contained therein.
                del sys.modules[main_mod_name]

        return stats
Esempio n. 12
0
    def run(self, parameter_s='', runner=None, file_finder=get_py_filename):
        """Run the named file inside IPython as a program.

        Usage:\\
          %run [-n -i -t [-N<N>] -d [-b<N>] -p [profile options]] file [args]

        Parameters after the filename are passed as command-line arguments to
        the program (put in sys.argv). Then, control returns to IPython's
        prompt.

        This is similar to running at a system prompt:\\
          $ python file args\\
        but with the advantage of giving you IPython's tracebacks, and of
        loading all variables into your interactive namespace for further use
        (unless -p is used, see below).

        The file is executed in a namespace initially consisting only of
        __name__=='__main__' and sys.argv constructed as indicated. It thus
        sees its environment as if it were being run as a stand-alone program
        (except for sharing global objects such as previously imported
        modules). But after execution, the IPython interactive namespace gets
        updated with all variables defined in the program (except for __name__
        and sys.argv). This allows for very convenient loading of code for
        interactive work, while giving each program a 'clean sheet' to run in.

        Options:

        -n: __name__ is NOT set to '__main__', but to the running file's name
        without extension (as python does under import).  This allows running
        scripts and reloading the definitions in them without calling code
        protected by an ' if __name__ == "__main__" ' clause.

        -i: run the file in IPython's namespace instead of an empty one. This
        is useful if you are experimenting with code written in a text editor
        which depends on variables defined interactively.

        -e: ignore sys.exit() calls or SystemExit exceptions in the script
        being run.  This is particularly useful if IPython is being used to
        run unittests, which always exit with a sys.exit() call.  In such
        cases you are interested in the output of the test results, not in
        seeing a traceback of the unittest module.

        -t: print timing information at the end of the run.  IPython will give
        you an estimated CPU time consumption for your script, which under
        Unix uses the resource module to avoid the wraparound problems of
        time.clock().  Under Unix, an estimate of time spent on system tasks
        is also given (for Windows platforms this is reported as 0.0).

        If -t is given, an additional -N<N> option can be given, where <N>
        must be an integer indicating how many times you want the script to
        run.  The final timing report will include total and per run results.

        For example (testing the script uniq_stable.py)::

            In [1]: run -t uniq_stable

            IPython CPU timings (estimated):\\
              User  :    0.19597 s.\\
              System:        0.0 s.\\

            In [2]: run -t -N5 uniq_stable

            IPython CPU timings (estimated):\\
            Total runs performed: 5\\
              Times :      Total       Per run\\
              User  :   0.910862 s,  0.1821724 s.\\
              System:        0.0 s,        0.0 s.

        -d: run your program under the control of pdb, the Python debugger.
        This allows you to execute your program step by step, watch variables,
        etc.  Internally, what IPython does is similar to calling:

          pdb.run('execfile("YOURFILENAME")')

        with a breakpoint set on line 1 of your file.  You can change the line
        number for this automatic breakpoint to be <N> by using the -bN option
        (where N must be an integer).  For example::

          %run -d -b40 myscript

        will set the first breakpoint at line 40 in myscript.py.  Note that
        the first breakpoint must be set on a line which actually does
        something (not a comment or docstring) for it to stop execution.

        When the pdb debugger starts, you will see a (Pdb) prompt.  You must
        first enter 'c' (without quotes) to start execution up to the first
        breakpoint.

        Entering 'help' gives information about the use of the debugger.  You
        can easily see pdb's full documentation with "import pdb;pdb.help()"
        at a prompt.

        -p: run program under the control of the Python profiler module (which
        prints a detailed report of execution times, function calls, etc).

        You can pass other options after -p which affect the behavior of the
        profiler itself. See the docs for %prun for details.

        In this mode, the program's variables do NOT propagate back to the
        IPython interactive namespace (because they remain in the namespace
        where the profiler executes them).

        Internally this triggers a call to %prun, see its documentation for
        details on the options available specifically for profiling.

        There is one special usage for which the text above doesn't apply:
        if the filename ends with .ipy, the file is run as ipython script,
        just as if the commands were written on IPython prompt.

        -m: specify module name to load instead of script path. Similar to
        the -m option for the python interpreter. Use this option last if you
        want to combine with other %run options. Unlike the python interpreter
        only source modules are allowed no .pyc or .pyo files.
        For example::

            %run -m example

        will run the example module.

        """

        # get arguments and set sys.argv for program to be run.
        opts, arg_lst = self.parse_options(parameter_s,
                                           'nidtN:b:pD:l:rs:T:em:',
                                           mode='list',
                                           list_all=1)
        if "m" in opts:
            modulename = opts["m"][0]
            modpath = find_mod(modulename)
            if modpath is None:
                warn('%r is not a valid modulename on sys.path' % modulename)
                return
            arg_lst = [modpath] + arg_lst
        try:
            filename = file_finder(arg_lst[0])
        except IndexError:
            warn('you must provide at least a filename.')
            print '\n%run:\n', oinspect.getdoc(self.run)
            return
        except IOError as e:
            try:
                msg = str(e)
            except UnicodeError:
                msg = e.message
            error(msg)
            return

        if filename.lower().endswith('.ipy'):
            self.shell.safe_execfile_ipy(filename)
            return

        # Control the response to exit() calls made by the script being run
        exit_ignore = 'e' in opts

        # Make sure that the running script gets a proper sys.argv as if it
        # were run from a system shell.
        save_argv = sys.argv  # save it for later restoring

        # simulate shell expansion on arguments, at least tilde expansion
        args = [os.path.expanduser(a) for a in arg_lst[1:]]

        sys.argv = [filename] + args  # put in the proper filename
        # protect sys.argv from potential unicode strings on Python 2:
        if not py3compat.PY3:
            sys.argv = [py3compat.cast_bytes(a) for a in sys.argv]

        if 'i' in opts:
            # Run in user's interactive namespace
            prog_ns = self.shell.user_ns
            __name__save = self.shell.user_ns['__name__']
            prog_ns['__name__'] = '__main__'
            main_mod = self.shell.new_main_mod(prog_ns)
        else:
            # Run in a fresh, empty namespace
            if 'n' in opts:
                name = os.path.splitext(os.path.basename(filename))[0]
            else:
                name = '__main__'

            main_mod = self.shell.new_main_mod()
            prog_ns = main_mod.__dict__
            prog_ns['__name__'] = name

        # Since '%run foo' emulates 'python foo.py' at the cmd line, we must
        # set the __file__ global in the script's namespace
        prog_ns['__file__'] = filename

        # pickle fix.  See interactiveshell for an explanation.  But we need to
        # make sure that, if we overwrite __main__, we replace it at the end
        main_mod_name = prog_ns['__name__']

        if main_mod_name == '__main__':
            restore_main = sys.modules['__main__']
        else:
            restore_main = False

        # This needs to be undone at the end to prevent holding references to
        # every single object ever created.
        sys.modules[main_mod_name] = main_mod

        try:
            stats = None
            with self.shell.readline_no_record:
                if 'p' in opts:
                    stats = self.prun('', None, False, opts, arg_lst, prog_ns)
                else:
                    if 'd' in opts:
                        deb = debugger.Pdb(self.shell.colors)
                        # reset Breakpoint state, which is moronically kept
                        # in a class
                        bdb.Breakpoint.next = 1
                        bdb.Breakpoint.bplist = {}
                        bdb.Breakpoint.bpbynumber = [None]
                        # Set an initial breakpoint to stop execution
                        maxtries = 10
                        bp = int(opts.get('b', [1])[0])
                        checkline = deb.checkline(filename, bp)
                        if not checkline:
                            for bp in range(bp + 1, bp + maxtries + 1):
                                if deb.checkline(filename, bp):
                                    break
                            else:
                                msg = (
                                    "\nI failed to find a valid line to set "
                                    "a breakpoint\n"
                                    "after trying up to line: %s.\n"
                                    "Please set a valid breakpoint manually "
                                    "with the -b option." % bp)
                                error(msg)
                                return
                        # if we find a good linenumber, set the breakpoint
                        deb.do_break('%s:%s' % (filename, bp))
                        # Start file run
                        print "NOTE: Enter 'c' at the",
                        print "%s prompt to start your script." % deb.prompt
                        ns = {
                            'execfile': py3compat.execfile,
                            'prog_ns': prog_ns
                        }
                        try:
                            #save filename so it can be used by methods on the deb object
                            deb._exec_filename = filename
                            deb.run('execfile("%s", prog_ns)' % filename, ns)

                        except:
                            etype, value, tb = sys.exc_info()
                            # Skip three frames in the traceback: the %run one,
                            # one inside bdb.py, and the command-line typed by the
                            # user (run by exec in pdb itself).
                            self.shell.InteractiveTB(etype,
                                                     value,
                                                     tb,
                                                     tb_offset=3)
                    else:
                        if runner is None:
                            runner = self.default_runner
                        if runner is None:
                            runner = self.shell.safe_execfile
                        if 't' in opts:
                            # timed execution
                            try:
                                nruns = int(opts['N'][0])
                                if nruns < 1:
                                    error('Number of runs must be >=1')
                                    return
                            except (KeyError):
                                nruns = 1
                            twall0 = time.time()
                            if nruns == 1:
                                t0 = clock2()
                                runner(filename,
                                       prog_ns,
                                       prog_ns,
                                       exit_ignore=exit_ignore)
                                t1 = clock2()
                                t_usr = t1[0] - t0[0]
                                t_sys = t1[1] - t0[1]
                                print "\nIPython CPU timings (estimated):"
                                print "  User   : %10.2f s." % t_usr
                                print "  System : %10.2f s." % t_sys
                            else:
                                runs = range(nruns)
                                t0 = clock2()
                                for nr in runs:
                                    runner(filename,
                                           prog_ns,
                                           prog_ns,
                                           exit_ignore=exit_ignore)
                                t1 = clock2()
                                t_usr = t1[0] - t0[0]
                                t_sys = t1[1] - t0[1]
                                print "\nIPython CPU timings (estimated):"
                                print "Total runs performed:", nruns
                                print "  Times  : %10.2f    %10.2f" % (
                                    'Total', 'Per run')
                                print "  User   : %10.2f s, %10.2f s." % (
                                    t_usr, t_usr / nruns)
                                print "  System : %10.2f s, %10.2f s." % (
                                    t_sys, t_sys / nruns)
                            twall1 = time.time()
                            print "Wall time: %10.2f s." % (twall1 - twall0)

                        else:
                            # regular execution
                            runner(filename,
                                   prog_ns,
                                   prog_ns,
                                   exit_ignore=exit_ignore)

                if 'i' in opts:
                    self.shell.user_ns['__name__'] = __name__save
                else:
                    # The shell MUST hold a reference to prog_ns so after %run
                    # exits, the python deletion mechanism doesn't zero it out
                    # (leaving dangling references).
                    self.shell.cache_main_mod(prog_ns, filename)
                    # update IPython interactive namespace

                    # Some forms of read errors on the file may mean the
                    # __name__ key was never set; using pop we don't have to
                    # worry about a possible KeyError.
                    prog_ns.pop('__name__', None)

                    self.shell.user_ns.update(prog_ns)
        finally:
            # It's a bit of a mystery why, but __builtins__ can change from
            # being a module to becoming a dict missing some key data after
            # %run.  As best I can see, this is NOT something IPython is doing
            # at all, and similar problems have been reported before:
            # http://coding.derkeiler.com/Archive/Python/comp.lang.python/2004-10/0188.html
            # Since this seems to be done by the interpreter itself, the best
            # we can do is to at least restore __builtins__ for the user on
            # exit.
            self.shell.user_ns['__builtins__'] = builtin_mod

            # Ensure key global structures are restored
            sys.argv = save_argv
            if restore_main:
                sys.modules['__main__'] = restore_main
            else:
                # Remove from sys.modules the reference to main_mod we'd
                # added.  Otherwise it will trap references to objects
                # contained therein.
                del sys.modules[main_mod_name]

        return stats