コード例 #1
0
ファイル: vinegar.py プロジェクト: tws0002/hman
def load(val, import_custom_exceptions, instantiate_custom_exceptions,
         instantiate_oldstyle_exceptions):
    if val == consts.EXC_STOP_ITERATION:
        return StopIteration  # optimization
    if type(val) is str:
        return val  # deprecated string exceptions

    (modname, clsname), args, attrs, tbtext = val
    if import_custom_exceptions and modname not in sys.modules:
        try:
            mod = __import__(modname, None, None, "*")
        except ImportError:
            pass
    if instantiate_custom_exceptions:
        cls = getattr(sys.modules[modname], clsname, None)
    elif modname == "exceptions":
        cls = getattr(exceptions, clsname, None)
    else:
        cls = None

    if not isinstance(cls, (type, ClassType)):
        cls = None
    elif issubclass(cls, ClassType) and not instantiate_oldstyle_exceptions:
        cls = None
    elif not issubclass(cls, BaseException):
        cls = None

    if cls is None:
        fullname = "%s.%s" % (modname, clsname)
        if fullname not in _generic_exceptions_cache:
            fakemodule = {"__module__": "%s.%s" % (__name__, modname)}
            if isinstance(GenericException, ClassType):
                _generic_exceptions_cache[fullname] = ClassType(
                    fullname, (GenericException, ), fakemodule)
            else:
                _generic_exceptions_cache[fullname] = type(
                    fullname, (GenericException, ), fakemodule)
        cls = _generic_exceptions_cache[fullname]

    # support old-style exception classes
    if isinstance(cls, ClassType):
        exc = InstanceType(cls)
    else:
        exc = cls.__new__(cls)

    exc.args = args
    for name, attrval in attrs:
        setattr(exc, name, attrval)
    if hasattr(exc, "_remote_tb"):
        exc._remote_tb += (tbtext, )
    else:
        exc._remote_tb = (tbtext, )
    return exc
コード例 #2
0
ファイル: vinegar.py プロジェクト: fruch/rpyc
def load(val, import_custom_exceptions, instantiate_custom_exceptions, 
         instantiate_oldstyle_exceptions):

    if val == consts.EXC_STOP_ITERATION:
        return StopIteration # optimization
    
    if type(val) is str:
        return val # deprecated string exceptions
    
    (modname, clsname), args, attrs, tbtext = val
    if import_custom_exceptions and modname not in sys.modules:
        try:
            mod = __import__(modname, None, None, "*")
        except ImportError:
            pass
    if instantiate_custom_exceptions:
        cls = getattr(sys.modules[modname], clsname, None)
    elif modname == "exceptions":
        cls = getattr(exceptions, clsname, None)
    else:
        cls = None
    
    if not isinstance(cls, (type, ClassType)):
        cls = None
    elif issubclass(cls, ClassType) and not instantiate_oldstyle_exceptions:
        cls = None
    elif not issubclass(cls, BaseException):
        cls = None
    
    if cls is None:
        fullname = "%s.%s" % (modname, clsname)
        if fullname not in _generic_exceptions_cache:
            fakemodule = {"__module__" : "%s.%s" % (__name__, modname)}
            if isinstance(GenericException, ClassType):
                _generic_exceptions_cache[fullname] = ClassType(fullname, (GenericException,), fakemodule)
            else:
                _generic_exceptions_cache[fullname] = type(fullname, (GenericException,), fakemodule)
        cls = _generic_exceptions_cache[fullname]
    
    # support old-style exception classes
    if isinstance(cls, ClassType):
        exc = InstanceType(cls)
    else:
        exc = cls.__new__(cls)
    
    exc.args = args
    for name, attrval in attrs:
        setattr(exc, name, attrval)
    if hasattr(exc, "_remote_tb"):
        exc._remote_tb += (tbtext,)
    else:
        exc._remote_tb = (tbtext,)
    return exc
コード例 #3
0
ファイル: jelly.py プロジェクト: DT021/wau
def _newInstance(cls, state=_NO_STATE):
    """
    Make a new instance of a class without calling its __init__ method.
    Supports both new- and old-style classes.

    @param state: A C{dict} used to update C{inst.__dict__} or C{_NO_STATE}
        to skip this part of initialization.

    @return: A new instance of C{cls}.
    """
    if not isinstance(cls, types.ClassType):
        # new-style
        inst = cls.__new__(cls)

        if state is not _NO_STATE:
            inst.__dict__.update(state)  # Copy 'instance' behaviour
    else:
        if state is not _NO_STATE:
            inst = InstanceType(cls, state)
        else:
            inst = InstanceType(cls)
    return inst
コード例 #4
0
def load(val, import_custom_exceptions, instantiate_custom_exceptions,
         instantiate_oldstyle_exceptions):
    """
    Loads a dumped exception (the tuple returned by :func:`dump`) info a
    throwable exception object. If the exception cannot be instantiated for any
    reason (i.e., the security parameters do not allow it, or the exception
    class simply doesn't exist on the local machine), a :class:`GenericException`
    instance will be returned instead, containing all of the original exception's
    details.

    :param val: the dumped exception
    :param import_custom_exceptions: whether to allow this function to import custom modules
                                     (imposes a security risk)
    :param instantiate_custom_exceptions: whether to allow this function to instantiate "custom
                                          exceptions" (i.e., not one of the built-in exceptions,
                                          such as ``ValueError``, ``OSError``, etc.)
    :param instantiate_oldstyle_exceptions: whether to allow this function to instantiate exception
                                            classes that do not derive from ``BaseException``.
                                            This is required to support old-style exceptions.
                                            Not applicable for Python 3 and above.

    :returns: A throwable exception object
    """
    if val == consts.EXC_STOP_ITERATION:
        return StopIteration  # optimization
    if type(val) is str:
        return val  # deprecated string exceptions

    (modname, clsname), args, attrs, tbtext = val
    if import_custom_exceptions and modname not in sys.modules:
        try:
            __import__(modname, None, None, "*")
        except Exception:
            pass

    if instantiate_custom_exceptions:
        if modname in sys.modules:
            cls = getattr(sys.modules[modname], clsname, None)
        else:
            cls = None
    elif modname == exceptions_module.__name__:
        cls = getattr(exceptions_module, clsname, None)
    else:
        cls = None

    if is_py3k:
        if not isinstance(cls, type) or not issubclass(cls, BaseException):
            cls = None
    else:
        if not isinstance(cls, (type, ClassType)):
            cls = None
        elif issubclass(cls,
                        ClassType) and not instantiate_oldstyle_exceptions:
            cls = None
        elif not issubclass(cls, BaseException):
            cls = None

    if cls is None:
        fullname = "%s.%s" % (modname, clsname)
        # py2: `type()` expects `str` not `unicode`!
        fullname = str(fullname)
        if fullname not in _generic_exceptions_cache:
            fakemodule = {"__module__": "%s/%s" % (__name__, modname)}
            if isinstance(GenericException, ClassType):
                _generic_exceptions_cache[fullname] = ClassType(
                    fullname, (GenericException, ), fakemodule)
            else:
                _generic_exceptions_cache[fullname] = type(
                    fullname, (GenericException, ), fakemodule)
        cls = _generic_exceptions_cache[fullname]

    cls = _get_exception_class(cls)

    # support old-style exception classes
    if ClassType is not type and isinstance(cls, ClassType):
        exc = InstanceType(cls)
    else:
        exc = cls.__new__(cls)

    exc.args = args
    for name, attrval in attrs:
        try:
            setattr(exc, name, attrval)
        except AttributeError:  # handle immutable attrs (@property)
            pass
    exc._remote_tb = tbtext
    return exc
コード例 #5
0
ファイル: vinegar.py プロジェクト: IDA-RE-things/idalink
def load(val, import_custom_exceptions, instantiate_custom_exceptions, instantiate_oldstyle_exceptions):
    """
    Loads a dumped exception (the tuple returned by :func:`dump`) info a 
    throwable exception object. If the exception cannot be instantiated for any
    reason (i.e., the security parameters do not allow it, or the exception 
    class simply doesn't exist on the local machine), a :class:`GenericException`
    instance will be returned instead, containing all of the original exception's
    details.
    
    :param val: the dumped exception
    :param import_custom_exceptions: whether to allow this function to import custom modules 
                                     (imposes a security risk)
    :param instantiate_custom_exceptions: whether to allow this function to instantiate "custom 
                                          exceptions" (i.e., not one of the built-in exceptions,
                                          such as ``ValueError``, ``OSError``, etc.)
    :param instantiate_oldstyle_exceptions: whether to allow this function to instantiate exception 
                                            classes that do not derive from ``BaseException``.
                                            This is required to support old-style exceptions. 
                                            Not applicable for Python 3 and above.
    
    :returns: A throwable exception object
    """
    if val == consts.EXC_STOP_ITERATION:
        return StopIteration # optimization
    if type(val) is str:
        return val # deprecated string exceptions

    (modname, clsname), args, attrs, tbtext = val
    if import_custom_exceptions and modname not in sys.modules:
        try:
            __import__(modname, None, None, "*")
        except ImportError:
            pass
    
    if instantiate_custom_exceptions:
        if modname in sys.modules:
            cls = getattr(sys.modules[modname], clsname, None)
        else:
            cls = None
    elif modname == exceptions_module.__name__:
        cls = getattr(exceptions_module, clsname, None)
    else:
        cls = None

    if is_py3k:
        if not isinstance(cls, type) or not issubclass(cls, BaseException):
            cls = None
    else:
        if not isinstance(cls, (type, ClassType)):
            cls = None
        elif issubclass(cls, ClassType) and not instantiate_oldstyle_exceptions:
            cls = None
        elif not issubclass(cls, BaseException):
            cls = None

    if cls is None:
        fullname = "%s.%s" % (modname, clsname)
        if fullname not in _generic_exceptions_cache:
            fakemodule = {"__module__" : "%s/%s" % (__name__, modname)}
            if isinstance(GenericException, ClassType):
                _generic_exceptions_cache[fullname] = ClassType(fullname, (GenericException,), fakemodule)
            else:
                _generic_exceptions_cache[fullname] = type(fullname, (GenericException,), fakemodule)
        cls = _generic_exceptions_cache[fullname]

    cls = _get_exception_class(cls)
    
    # support old-style exception classes
    if ClassType is not type and isinstance(cls, ClassType):
        exc = InstanceType(cls)
    else:
        exc = cls.__new__(cls)

    exc.args = args
    for name, attrval in attrs:
        setattr(exc, name, attrval)
    exc._remote_tb = tbtext
    return exc