def test(modules=None):
import os
import ast as ast_mod
if not modules:
#d = 'C:\\Python25\\Lib\\'
d = '/usr/lib/python2.7/'
modules = [d + f for f in os.listdir(d) if f.endswith('.py')]
for f in modules:
shutil.copy(f, 'input.py')
msg = '%s...' % os.path.basename(f)
ast, comments = parse_with_comments(f)
print_code_and_ast(f, ast, comments)
print
print
print ast_mod.dump(ast_mod.parse(file(f).read()), 0)
try:
ast2py(ast, comments)
except:
raise
msg += 'failed to converting AST back to python code'
try:
if f == 'parser_test_source.py':
print;print
print file('output.py').read() # see the results
parse(file('output.py').read())
msg += 'OK'
except:
raise
msg += 'failed to parse generated code'
print msg
break
def main(argv):
args = argv[1:]
for path in args:
if path.endswith('.zip'):
zf = zipfile.ZipFile(path)
for name in zf.namelist():
sys.stderr.write('parsing: %r\n' % name)
sys.stderr.flush()
data = zf.read(name)
try:
tree = compiler.parse(data)
traverse(tree)
except SyntaxError, e:
print 'error:', name, e
zf.close()
else:
sys.stderr.write('parsing: %r\n' % path)
sys.stderr.flush()
fp = open(path, 'rb')
data = fp.read()
try:
tree = compiler.parse(data)
traverse(tree)
except SyntaxError, e:
print 'error:', name, e
fp.close()
def run(self, grammar):
self.message = self.name + ': '
if self.code == '':
self.message = self.message + 'No test set'
return
try:
try:
tree = str(compiler.parse(self.code))
except SyntaxError:
self.message = self.message + """Error in test.\n""" + self.code
raise EscapeException()
try:
matcher = grammar(tree)
generated = matcher.apply('any')
except ParseError:
self.message = self.message + """Error in grammar.\n""" + self.code + """\n\n""" + tree
raise EscapeException()
try:
assert str(compiler.parse(generated)) == tree
except AssertionError:
self.message = self.message + """Error, generated code does not match original.\n""" + self.code + """\n\n""" + tree + """\n\n""" + generated
raise EscapeException()
except SyntaxError:
self.message = self.message + """Error in generated code.\n""" + self.code + """\n\n""" + tree + """\n\n""" + generated
raise EscapeException()
self.message = self.message + "OK"
self.result = True
except EscapeException:
pass
def _safeEval(self, s):
"""
Evaluate strings that only contain the following structures:
const, tuple, list, dict
Taken from c.l.py newsgroup posting Nov 5, 2003 by Huaiyu Zhu at IBM Almaden
??? this may need to be expanded to support complex numbers in lists, etc.
"""
#print "in _safeEval. input: '%s'" % s
node1 = compiler.parse(s)
# !!! special case of attempting to compile a lone string
if node1.doc is not None and len(node1.node.nodes) == 0:
#print "in _safeEval. string: '%s' found as docstring" % node1.doc
return node1.doc
#print "in _safeEval. nodes: '%s'" % (node1,)
stmts = node1.node.nodes
assert len(stmts) == 1
node = compiler.parse(s).node.nodes[0]
assert node.__class__ == compiler.ast.Discard
nodes = node.getChildNodes()
assert len(nodes) == 1
result = self._safeAssemble(nodes[0])
#print "in _safeEval result: '%s'" % (result,)
return result
def get_ast():
if options.filename:
with open(options.filename, 'r') as f:
return compiler.parse("".join(f.readlines()))
else:
import sys
return compiler.parse("".join(sys.stdin))
def _safeEval(self, s):
"""
Evaluate strings that only contain the following structures:
const, tuple, list, dict
Taken from c.l.py newsgroup posting Nov 5, 2003 by Huaiyu Zhu at IBM Almaden
??? this may need to be expanded to support complex numbers in lists, etc.
"""
#print "in _safeEval. input: '%s'" % s
node1 = compiler.parse(s)
# !!! special case of attempting to compile a lone string
if node1.doc is not None and len(node1.node.nodes) == 0:
#print "in _safeEval. string: '%s' found as docstring" % node1.doc
return node1.doc
#print "in _safeEval. nodes: '%s'" % (node1,)
stmts = node1.node.nodes
assert len(stmts) == 1
node = compiler.parse(s).node.nodes[0]
assert node.__class__ == compiler.ast.Discard
nodes = node.getChildNodes()
assert len(nodes) == 1
result = self._safeAssemble(nodes[0])
#print "in _safeEval result: '%s'" % (result,)
return result
def verify_source(source):
tree = fix_tree(parse(source, 'exec'))
code = pycodegen.ModuleCodeGenerator(tree).getCode()
generator = ModuleSourceCodeGenerator(tree)
source = generator.getSourceCode()
tree = fix_tree(parse(source, 'exec'))
if code.co_code != pycodegen.ModuleCodeGenerator(tree).getCode().co_code:
return source
def get_ast():
if options.filename:
with open(options.filename, "r") as f:
return compiler.parse("".join(f.readlines()))
else:
import sys
return compiler.parse("".join(sys.stdin))
def errorPythonSource(source):
""" 检查python代码的合理性 """
try:
source = source.replace('\r', '')
compiler.parse(source)
except:
return "语法错误"
return ''
def check_syntax(self, cmd_string):
"Checks syntax for syntax-errors"
try:
compiler.parse(cmd_string)
return True
except Exception, e:
self.gui.show_error_dialog("Syntax Error In Experiment Script", "Experiment Script: " + str(e))
self.gui.new_log_message("Syntax Error: " + str(e), "ES")
return False
def has_changed(self, fpath):
""" answer whether has_changed(fpath) since list mirror """
before = open(fpath,'r').read()
after = open((self^fpath),'r').read()
file_changed = not( before == after )
ast_changed = compiler.parse(before,'exec')==compiler.parse(after,'exec')
out = dict( file_changed=file_changed,
ast_changed=ast_changed )
return out
def _analyzeGens(top, absnames):
genlist = []
for g in top:
if isinstance(g, _UserCode):
ast = g
elif isinstance(g, (_AlwaysComb, _Always)):
f = g.func
s = inspect.getsource(f)
# remove decorators
s = re.sub(r"@.*", "", s)
s = s.lstrip()
ast = compiler.parse(s)
# print ast
ast.sourcefile = inspect.getsourcefile(f)
ast.lineoffset = inspect.getsourcelines(f)[1]-1
ast.symdict = f.func_globals.copy()
ast.callstack = []
# handle free variables
if f.func_code.co_freevars:
for n, c in zip(f.func_code.co_freevars, f.func_closure):
obj = _cell_deref(c)
if isinstance(g, _AlwaysComb):
# print type(obj)
assert isinstance(obj, (int, long, Signal)) or \
_isMem(obj) or _isTupleOfInts(obj)
ast.symdict[n] = obj
ast.name = absnames.get(id(g), str(_Label("BLOCK"))).upper()
v = _NotSupportedVisitor(ast)
compiler.walk(ast, v)
if isinstance(g, _AlwaysComb):
v = _AnalyzeAlwaysCombVisitor(ast, g.senslist)
else:
v = _AnalyzeAlwaysDecoVisitor(ast, g.senslist)
compiler.walk(ast, v)
else: # @instance
f = g.gen.gi_frame
s = inspect.getsource(f)
# remove decorators
s = re.sub(r"@.*", "", s)
s = s.lstrip()
ast = compiler.parse(s)
# print ast
ast.sourcefile = inspect.getsourcefile(f)
ast.lineoffset = inspect.getsourcelines(f)[1]-1
ast.symdict = f.f_globals.copy()
ast.symdict.update(f.f_locals)
ast.callstack = []
ast.name = absnames.get(id(g), str(_Label("BLOCK"))).upper()
v = _NotSupportedVisitor(ast)
compiler.walk(ast, v)
v = _AnalyzeBlockVisitor(ast)
compiler.walk(ast, v)
genlist.append(ast)
return genlist
def pythonCodeContainsErrorOnParse(self, code):
flag = False
ls = []
try:
compiler.parse(code, mode = "exec")
except Exception as e:
flag = True
# traceback.print_exc()
s = traceback.format_exc()
ls = s.split("\n")
return flag,ls
def fetch_git(repo_dir):
#create new user object
users = Users()
os.chdir(repo_dir)
os.system('git checkout master -q')
proc = subprocess.Popen(['git', 'log', '--pretty=format:%H %ct'],stdout=subprocess.PIPE)
commit_log = proc.stdout.readlines()
commit_log.reverse()
for log in commit_log:
log = log.strip()
(commit,date) = log.split(' ')
os.system('git checkout ' + commit + ' -q')
# print(commit,date)
proc = subprocess.Popen(['git', 'diff-tree', '--no-commit-id', '--name-only', '-r', commit],stdout=subprocess.PIPE)
changes = proc.stdout.readlines()
#print(changes)
for change in changes:
path = change.strip()
dir,filename = os.path.split(path)
host,name = os.path.split(dir)
user = users.get_user(host,name)
if user == None:
user = users.add_user(host,name,filename)
try:
with open(path) as fh:
data = fh.read()
try:
compiler.parse(data)
syntax = 1
except Exception as e:
#print("exception!")
#print(e)
syntax = 0
lines = len(data.splitlines())
except IOError:
continue
#times 1000 for javascript flot
time = int(date) * 1000
history = History(commit,time,lines,syntax)
user.add_version(filename,history)
#reset to head
os.system('git checkout master -q')
os.chdir('..')
return users
def verify_source(source):
tree = fix_tree(parse(source, 'exec'))
code = pycodegen.ModuleCodeGenerator(tree).getCode()
generator = ModuleSourceCodeGenerator(tree)
generated = generator.getSourceCode()
try:
new = fix_tree(parse(generated, 'exec'))
except SyntaxError:
return generated
old = code.co_code
new = pycodegen.ModuleCodeGenerator(new).getCode().co_code
if old != new:
return generated
def canonize(self, student_answer, state=None):
if re.match('.*;[ \t]*$', student_answer):
return (False,
'On ne met pas de <tt>;</tt> en fin de ligne en Python')
if '...' in student_answer:
return (
False,
"Enlevez les «...» en début de ligne, ils ne font pas parti du langage. C'est l'invite de commande de l'interpréteur"
)
try:
compiler.parse(student_answer)
except SyntaxError as e:
return (False, 'Message de Python : <b>' + cgi.escape(str(e)) +
'</b><br>')
return P_clean(student_answer)
def verify_source(source):
tree = fix_tree(parse(source, 'exec'))
code = pycodegen.ModuleCodeGenerator(tree).getCode()
generator = ModuleSourceCodeGenerator(tree)
generated = generator.getSourceCode()
try:
new = fix_tree(parse(generated, 'exec'))
except SyntaxError:
return generated
old = code.co_code
new = pycodegen.ModuleCodeGenerator(new).getCode().co_code
if old != new:
return generated
def searchImportedModulesForDefinition(scope,node):
lines = scope.module.getSourceNode().getLines()
for lineno in scope.getImportLineNumbers():
logicalline = getLogicalLine(lines,lineno)
logicalline = makeLineParseable(logicalline)
ast = compiler.parse(logicalline)
class ImportVisitor:
def __init__(self,node):
self.target = node
self.match = None
assert isinstance(self.target,Name), \
"Getattr not supported"
def visitFrom(self, node):
module = resolveImportedModuleOrPackage(scope,node.modname)
if module is None: # couldn't find module
return
if node.names[0][0] == '*': # e.g. from foo import *
match = findDefinitionFromASTNode(module,self.target)
if match is not None:
self.match = match
return
for name, alias in node.names:
if alias is None and name == self.target.name:
match = findDefinitionFromASTNode(module,self.target)
if match is not None:
self.match = match
return
match = visitor.walk(ast, ImportVisitor(node)).match
if match:
return match
def literal_eval(node_or_string):
"""
Safely evaluate an expression node or a string containing a Python
expression. The string or node provided may only consist of the following
Python literal structures: strings, numbers, tuples, lists, dicts, booleans,
and None.
"""
_safe_names = {'None': None, 'True': True, 'False': False}
if isinstance(node_or_string, string_types):
node_or_string = parse(node_or_string, mode='eval')
if isinstance(node_or_string, ast.Expression):
node_or_string = node_or_string.node
def _convert(node):
if isinstance(node, ast.Const) and isinstance(node.value, (text_type, binary_type, float, complex) + integer_types):
return node.value
elif isinstance(node, ast.Tuple):
return tuple(map(_convert, node.nodes))
elif isinstance(node, ast.List):
return list(map(_convert, node.nodes))
elif isinstance(node, ast.Dict):
return dict((_convert(k), _convert(v)) for k, v in node.items())
elif isinstance(node, ast.Name):
if node.name in _safe_names:
return _safe_names[node.name]
elif isinstance(node, ast.UnarySub):
return -_convert(node.expr) # pylint: disable=invalid-unary-operand-type
raise ValueError('malformed string')
return _convert(node_or_string)
def test_visitLambda(self):
from common import MatchFinder
finder = MatchFinder()
src = '''x = lambda a, b, c=None, d=None: (a + b) and c or d'''
ast = compiler.parse(src)
finder.reset(src)
compiler.walk(ast, finder)
def split_commands(self, python):
""" Split multiple lines of code into discrete commands that can be
executed singly.
Parameters
----------
python : str
Pure, exec'able Python code.
Returns
-------
commands : list of str
Separate commands that can be exec'ed independently.
"""
# The compiler module will parse the code into an abstract syntax tree.
ast = compiler.parse(python)
# Each separate command is available by iterating over ast.node. The
# lineno attribute is the line number (1-indexed) beginning the commands
# suite.
linenos = [x.lineno-1 for x in ast.node]
# When we finally get the slices, we will need to slice all the way to
# the end even though we don't have a line number for it. Fortunately,
# None does the job nicely.
linenos.append(None)
lines = python.split('\n')
# Hooray for incomprehensible list comprehensions!
commands = ['\n'.join(lines[i:j]) for i, j in
zip(linenos[:-1], linenos[1:])]
return commands
def makejson(config):
#config=json.load('make_path')
with open(config['source'], encoding='utf8') as f:
python_code = f.read()
tree = ast.parse(python_code)
js_code_body = compiler.parse(tree)
# import include code
if 'include' in config:
js_code_head_list = []
include = config['include'] if type(
config['include']) == list else [config['include']]
for _include in include:
with open(_include, encoding="utf8") as f:
js_code_head_list.append(f.read())
js_code_head = '\n'.join(js_code_head_list)
else:
js_code_head = ''
# direct export
if 'module_name' not in config:
return output(config, js_code_head + '\n' + js_code_body)
#module export
module_name = config['module_name']
exports = config['export']
comment = config.get('comment', '')
content = module_template.render(js_code_head=tab(js_code_head),
js_code_body=tab(js_code_body),
module_name=module_name,
exports=exports,
comment=comment)
return output(config, content)
def updateModel(self, buf):
"""
To call whenever the model has been updated in a way
that could impact the outline.
We do not modify the current outline in case of a
syntax error.
"""
try:
mod = compiler.parse(buf)
except SyntaxError:
log("Syntax error, no outline updated")
return
self.clear()
self._items = []
visitor = OutlineAstVisitor(self)
try:
visitor.preorder(mod, visitor, None)
visitor.endCurrentVisitedItem()
del mod, visitor
except SyntaxError:
log("Syntax error, outline not created")
finally:
gc.collect()
def getAssignments(lines):
class AssignVisitor:
def __init__(self):
self.assigns = []
def visitAssTuple(self, node):
for a in node.nodes:
if a.name not in self.assigns:
self.assigns.append(a.name)
def visitAssName(self, node):
if node.name not in self.assigns:
self.assigns.append(node.name)
def visitAugAssign(self, node):
if isinstance(node.node, compiler.ast.Name):
if node.node.name not in self.assigns:
self.assigns.append(node.node.name)
assignfinder = AssignVisitor()
for line in lines:
doctoredline = makeLineParseable(line)
try:
ast = compiler.parse(doctoredline)
except ParserError:
raise ParserException("couldnt parse:"+doctoredline)
visitor.walk(ast, assignfinder)
return assignfinder.assigns
def check(code_string, filename):
"""check a code string"""
try:
tree = compiler.parse(code_string)
except (SyntaxError, IndentationError):
value = sys.exc_info()[1]
try:
(lineno, offset, line) = value[1][1:]
except IndexError:
print('could not compile %r' % (filename,), file=sys.stderr)
return 1
if line.endswith("\n"):
line = line[:-1]
print('%s:%d: could not compile' % (filename, lineno), file=sys.stderr)
print(line, file=sys.stderr)
print(" " * (offset-2), "^", file=sys.stderr)
return 1
else:
import locale
try:
locale.setlocale(locale.LC_ALL, 'C')
except locale.Error as e:
print('setlocale failed: %s' % (e,), file=sys.stderr)
w = FlakeChecker(tree, filename)
w.messages.sort(lambda a, b: cmp(a.lineno, b.lineno))
for warning in w.messages:
print(warning)
return len(w.messages)
def get_pysmell_code_walk_to_text(self, text):
code = compiler.parse(text)
class GlobalCodeFinder(CodeFinder):
def visitFunction(self, func):
self.enterScope(func)
if self.inClassFunction:
if func.name != '__init__':
if func.decorators and 'property' in [
getName(n) for n in func.decorators
]:
self.modules.addProperty(self.currentClass,
func.name)
else:
self.modules.addMethod(self.currentClass,
func.name,
getFuncArgs(func), func.doc
or "")
else:
self.modules.setConstructor(self.currentClass,
getFuncArgs(func))
elif len(self.scope) == 1:
self.modules.addFunction(func.name,
getFuncArgs(func, inClass=False),
func.doc or "")
#self.visit(func.code) Remove this line
self.exitScope()
if self.scope == SCOPE_GLOBAL:
codefinder = GlobalCodeFinder()
else:
codefinder = CodeFinder()
codefinder.modules = PyPleteModuleDict()
return compiler.walk(code, codefinder)
def literal_eval(node_or_string):
"""Safely evaluate a node/string containing a Python expression.
Thestring or node provided may only consist of the following Python literal
structures: strings, numbers, tuples, lists, dicts, booleans, and None.
Essentially a backport of the literal_eval function in python 2.6 onwards.
From: http://mail.python.org/pipermail/python-list/2009-September/1219992.html
"""
_safe_names = {'None': None, 'True': True, 'False': False}
if isinstance(node_or_string, str):
node_or_string = parse(node_or_string, mode='eval')
if isinstance(node_or_string, ast.Expression):
node_or_string = node_or_string.node
def _convert(node):
'''Convert node/string to expression.'''
if isinstance(node, ast.Const) and isinstance(
node.value, (str, int, float, complex)):
return node.value
elif isinstance(node, ast.Tuple):
return tuple(_convert(element) for element in node.nodes)
elif isinstance(node, ast.List):
return list(_convert(element) for element in node.nodes)
elif isinstance(node, ast.Dict):
return dict((_convert(k), _convert(v)) for k, v in node.items)
elif isinstance(node, ast.Name):
if node.name in _safe_names:
return _safe_names[node.name]
elif isinstance(node, ast.UnarySub):
return -_convert(node.expr)
raise ValueError('malformed string')
return _convert(node_or_string)
def get_vars_in_expression(source):
'''Get list of variable names in a python expression.'''
import compiler
from compiler.ast import Node
##
# @brief Internal recursive function.
# @param node An AST parse Node.
# @param var_list Input list of variables.
# @return An updated list of variables.
def get_vars_body(node, var_list=[]):
if isinstance(node, Node):
if node.__class__.__name__ == 'Name':
for child in node.getChildren():
if child not in var_list:
var_list.append(child)
for child in node.getChildren():
if isinstance(child, Node):
for child in node.getChildren():
var_list = get_vars_body(child, var_list)
break
return var_list
return get_vars_body(compiler.parse(source))
def literal_eval(node_or_string):
_safe_names = {'none': none, 'true': true, 'false': false}
if isinstance(node_or_string, basestring):
node_or_string = parse(node_or_string, mode='eval')
if isinstance(node_or_string, compiler.ast.expression):
node_or_string = node_or_string.node
def _convert(node):
if isinstance(node, compiler.ast.const) and isinstance(
node.value, (basestring, int, float, long, complex)):
return node.value
elif isinstance(node, compiler.ast.tuple):
return tuple(map(_convert, node.nodes))
elif isinstance(node, compiler.ast.list):
return list(map(_convert, node.nodes))
elif isinstance(node, compiler.ast.dict):
return dict(
(_convert(k), _convert(v)) for k, v in node.items)
elif isinstance(node, compiler.ast.name):
if node.name in _safe_names:
return _safe_names[node.name]
elif isinstance(node, compiler.ast.unarysub):
return -_convert(node.expr)
raise valueerror('malformed string')
return _convert(node_or_string)
def get_code_complexity(code, min=7, filename='stdin'):
complex = []
try:
ast = parse(code)
except AttributeError:
e = sys.exc_info()[1]
sys.stderr.write("Unable to parse %s: %s\n" % (filename, e))
return 0
visitor = PathGraphingAstVisitor()
visitor.preorder(ast, visitor)
for graph in visitor.graphs.values():
if graph is None:
# ?
continue
if graph.complexity() >= min:
complex.append(
dict(type='W',
lnum=graph.lineno,
text='%s %r is too complex (%d)' % (
WARNING_CODE,
graph.entity,
graph.complexity(),
)))
return complex
def main():
filename = 'tests/implicit_main.py'
ast = parse(open(filename).read())
import pprint
pprint.pprint(ast)
s = ast2py(ast)
return s
def literal_eval(node_or_string):
_safe_names = {'none': none, 'true': true, 'false': false}
if isinstance(node_or_string, basestring):
node_or_string = parse(node_or_string, mode='eval')
if isinstance(node_or_string, compiler.ast.expression):
node_or_string = node_or_string.node
def _convert(node):
if isinstance(node, compiler.ast.const) and isinstance(node.value,
(basestring, int, float, long, complex)):
return node.value
elif isinstance(node, compiler.ast.tuple):
return tuple(map(_convert, node.nodes))
elif isinstance(node, compiler.ast.list):
return list(map(_convert, node.nodes))
elif isinstance(node, compiler.ast.dict):
return dict((_convert(k), _convert(v)) for k, v
in node.items)
elif isinstance(node, compiler.ast.name):
if node.name in _safe_names:
return _safe_names[node.name]
elif isinstance(node, compiler.ast.unarysub):
return -_convert(node.expr)
raise valueerror('malformed string')
return _convert(node_or_string)
def checkBeforeAndAfter(self):
from RestrictedPython.RCompile import RModule
from RestrictedPython.tests import before_and_after
from compiler import parse
defre = re.compile(r'def ([_A-Za-z0-9]+)_(after|before)\(')
beforel = [
name for name in before_and_after.__dict__
if name.endswith("_before")
]
for name in beforel:
before = getattr(before_and_after, name)
before_src = get_source(before)
before_src = re.sub(defre, r'def \1(', before_src)
rm = RModule(before_src, '')
tree_before = rm._get_tree()
after = getattr(before_and_after, name[:-6] + 'after')
after_src = get_source(after)
after_src = re.sub(defre, r'def \1(', after_src)
tree_after = parse(after_src)
self.assertEqual(str(tree_before), str(tree_after))
rm.compile()
verify.verify(rm.getCode())
def find_executable_statements(self, text, exclude=None):
# Find lines which match an exclusion pattern.
excluded = {}
suite_spots = {}
if exclude:
reExclude = re.compile(exclude)
lines = text.split('\n')
for i in range(len(lines)):
if reExclude.search(lines[i]):
excluded[i + 1] = 1
# Parse the code and analyze the parse tree to find out which statements
# are multiline, and where suites begin and end.
import parser
tree = parser.suite(text + '\n\n').totuple(1)
self.get_suite_spots(tree, suite_spots)
#print "Suite spots:", suite_spots
# Use the compiler module to parse the text and find the executable
# statements. We add newlines to be impervious to final partial lines.
statements = {}
ast = compiler.parse(text + '\n\n')
visitor = StatementFindingAstVisitor(statements, excluded, suite_spots)
compiler.walk(ast, visitor, walker=visitor)
lines = statements.keys()
lines.sort()
excluded_lines = excluded.keys()
excluded_lines.sort()
return lines, excluded_lines, suite_spots
def run_pyflakes_for_package(package_name, extra_ignore=None):
"""
If pyflakes is installed, run it across the given package name
returning any warnings found.
"""
ignore_strings = PYFLAKES_IGNORE
if extra_ignore:
ignore_strings += extra_ignore
try:
from pyflakes.checker import Checker
except ImportError:
return []
warnings = []
for (root, dirs, files) in os.walk(path_for_import(package_name)):
for f in files:
# Ignore migrations.
directory = root.split(os.sep)[-1]
if not f.endswith(".py") or directory == "migrations":
continue
path = os.path.join(root, f)
with open(path, "U") as source_file:
source = source_file.read()
try:
compile(source, f, "exec")
except (SyntaxError, IndentationError), value:
info = (path, value.lineno, value.args[0])
warnings.append("Invalid syntax in %s:%d: %s" % info)
result = Checker(parse(source), path)
for warning in result.messages:
message = unicode(warning)
for ignore in ignore_strings:
if ignore in message:
break
else:
warnings.append(message)
def main(argv):
opar = optparse.OptionParser()
opar.add_option("-d",
"--dot",
dest="dot",
help="output a graphviz dot file",
action="store_true")
opar.add_option("-m",
"--min",
dest="min",
help="minimum complexity for output",
type="int",
default=2)
options, args = opar.parse_args(argv)
text = open(args[0], "rU").read() + '\n\n'
ast = parse(text)
visitor = PathGraphingAstVisitor()
visitor.preorder(ast, visitor)
if options.dot:
print('graph {')
for graph in visitor.graphs.values():
if graph.complexity() >= options.min:
graph.to_dot()
print('}')
else:
for graph in visitor.graphs.values():
if graph.complexity() >= options.min:
print(graph.name, graph.complexity())
def parse_python_source(fn):
"""Parse the file 'fn' and return two things:
1. The AST tree.
2. A list of lines of the source line (typically used for verbose error
messages).
If the file has a syntax error in it, the first argument will be None.
"""
# Read the file's contents to return it.
# Note: we make sure to use universal newlines.
try:
contents = open(fn, 'rU').read()
lines = contents.splitlines()
except (IOError, OSError) as e:
logging.error("Could not read file '%s'." % fn)
return None, None
# Convert the file to an AST.
try:
ast = compiler.parse(contents)
except SyntaxError as e:
err = '%s:%s: %s' % (fn, e.lineno or '--', e.msg)
logging.error("Error processing file '%s':\n%s" % (fn, err))
return None, lines
except TypeError as e:
# Note: this branch untested, applied from a user-submitted patch.
err = '%s: %s' % (fn, str(e))
logging.error("Error processing file '%s':\n%s" % (fn, err))
return None, lines
return ast, lines
def run(self):
self.sleep(2)
exts = settings.SYNTAX.get('python')['extension']
file_ext = file_manager.get_file_extension(self._editor.ID)
if file_ext in exts:
try:
self.reset()
source = self._editor.get_text()
if self._editor.encoding is not None:
source = source.encode(self._editor.encoding)
parseResult = compiler.parse(source)
self.checker = checker.Checker(parseResult, self._editor.ID)
for m in self.checker.messages:
lineno = m.lineno - 1
if lineno not in self.errorsSummary:
message = [m.message % m.message_args]
else:
message = self.errorsSummary[lineno]
message += [m.message % m.message_args]
self.errorsSummary[lineno] = message
except Exception, reason:
if hasattr(reason, 'lineno'):
self.errorsSummary[reason.lineno - 1] = [reason.message]
else:
self.errorsSummary[0] = [reason.message]
def safeEval(s, namespace={'True': True, 'False': False, 'None': None}):
"""Evaluates s, safely. Useful for turning strings into tuples/lists/etc.
without unsafely using eval()."""
try:
node = compiler.parse(s)
except SyntaxError, e:
raise ValueError, 'Invalid string: %s.' % e
def check(codeString, filename):
message = []
try:
codeString = codeString.replace('\r\n', '\n')
tree = compiler.parse(codeString)
except (SyntaxError, IndentationError):
value = sys.exc_info()[1]
if isinstance(value, Exception):
lineno = value.lineno
offset = value.offset
line = value.text
# if line and line.endswith("\n"):
# line = line[:-1]
message.append((filename, lineno, value.msg))
except:
error.traceback()
message.append(
(filename, -1,
tr('There are some unknown errors, please check error.txt')))
else:
w = checker.Checker(tree, filename)
w.messages.sort(lambda a, b: cmp(a.lineno, b.lineno))
for warning in w.messages:
message.append((filename, warning.lineno,
warning.message % warning.message_args))
return message
def literal_eval(node_or_string):
"""
Safely evaluate an expression node or a string containing a Python
expression. The string or node provided may only consist of the following
Python literal structures: strings, numbers, tuples, lists, dicts, booleans,
and None.
"""
_safe_names = {'None': None, 'True': True, 'False': False}
if isinstance(node_or_string, string_types):
node_or_string = parse(node_or_string, mode='eval')
if isinstance(node_or_string, ast.Expression):
node_or_string = node_or_string.node
def _convert(node):
if isinstance(node, ast.Const) and isinstance(node.value, (text_type, binary_type, float, complex) + integer_types):
return node.value
elif isinstance(node, ast.Tuple):
return tuple(map(_convert, node.nodes))
elif isinstance(node, ast.List):
return list(map(_convert, node.nodes))
elif isinstance(node, ast.Dict):
return dict((_convert(k), _convert(v)) for k, v in node.items())
elif isinstance(node, ast.Name):
if node.name in _safe_names:
return _safe_names[node.name]
elif isinstance(node, ast.UnarySub):
return -_convert(node.expr)
raise ValueError('malformed string')
return _convert(node_or_string)
def get_code_complexity(code, min=7, filename='stdin'):
complex = []
try:
ast = parse(code)
except (AttributeError, SyntaxError):
e = sys.exc_info()[1]
sys.stderr.write("Unable to parse %s: %s\n" % (filename, e))
return 0
visitor = PathGraphingAstVisitor()
visitor.preorder(ast, visitor)
for graph in visitor.graphs.values():
if graph is None:
# ?
continue
if graph.complexity() >= min:
graph.filename = filename
if not skip_warning(graph):
msg = '%s:%d:1: %s %r is too complex (%d)' % (
filename,
graph.lineno,
WARNING_CODE,
graph.entity,
graph.complexity(),
)
complex.append(msg)
if len(complex) == 0:
return 0
print('\n'.join(complex))
return len(complex)
def get_code_complexity(code, min=7, filename='stdin'):
complex = []
try:
ast = parse(code)
except (AttributeError, SyntaxError):
e = sys.exc_info()[1]
sys.stderr.write("Unable to parse %s: %s\n" % (filename, e))
return 0
visitor = PathGraphingAstVisitor()
visitor.preorder(ast, visitor)
for graph in visitor.graphs.values():
if graph is None:
# ?
continue
if graph.complexity() >= min:
graph.filename = filename
if not skip_warning(graph):
msg = '%s:%d:1: %s %r is too complex (%d)' % (
filename,
graph.lineno,
WARNING_CODE,
graph.entity,
graph.complexity(),
)
complex.append(msg)
if len(complex) == 0:
return 0
print('\n'.join(complex))
return len(complex)
def parse_python_source(fn):
contents = open(fn, 'rU').read()
ast = compiler.parse(contents)
vis = ImportVisitor()
compiler.walk(ast, vis, ImportWalker(vis))
return vis.finalize()
def parse_python_source(fn):
contents = open(fn, 'rU').read()
ast = compiler.parse(contents)
vis = ImportVisitor()
compiler.walk(ast, vis, ImportWalker(vis))
return vis.finalize()
def _checkBeforeAndAfter(self, mod):
from RestrictedPython.RCompile import RModule
from compiler import parse
defre = re.compile(r'def ([_A-Za-z0-9]+)_(after|before)\(')
beforel = [name for name in mod.__dict__
if name.endswith("_before")]
for name in beforel:
before = getattr(mod, name)
before_src = get_source(before)
before_src = re.sub(defre, r'def \1(', before_src)
rm = RModule(before_src, '')
tree_before = rm._get_tree()
after = getattr(mod, name[:-6]+'after')
after_src = get_source(after)
after_src = re.sub(defre, r'def \1(', after_src)
tree_after = parse(after_src)
self.assertEqual(str(tree_before), str(tree_after))
rm.compile()
verify.verify(rm.getCode())
def parse_n3_term(src):
"""
Parse a Notation3 value into a RDFTerm object (IRI or Literal).
This parser understands IRIs and quoted strings; basic non-string types
(integers, decimals, booleans, etc) are not supported yet.
"""
src = unicode(src)
if src.startswith('<'):
# `src` is an IRI
if not src.endswith('>'):
raise ValueError
value = src[1:-1]
if '<' in value or '>' in value:
raise ValueError
return IRI(value)
else:
datatype_match = _n3parser_datatype.search(src)
if datatype_match is not None:
datatype = datatype_match.group('datatype')
src = _n3parser_datatype.sub('', src)
else:
datatype = None
lang_match = _n3parser_lang.search(src)
if lang_match is not None:
lang = lang_match.group('lang')
src = _n3parser_lang.sub('', src)
else:
lang = None
# Python literals syntax is mostly compatible with N3.
# We don't execute the code, just turn it into an AST.
try:
ast = compiler.parse("value = u" + src)
except:
raise ValueError
# Don't allow any extra tokens in the AST
if len(ast.node.getChildNodes()) != 1:
raise ValueError
assign_node = ast.node.getChildNodes()[0]
if len(assign_node.getChildNodes()) != 2:
raise ValueError
value_node = assign_node.getChildNodes()[1]
if value_node.getChildNodes():
raise ValueError
if value_node.__class__ != compiler.ast.Const:
raise ValueError
value = value_node.value
if type(value) is not unicode:
raise ValueError
return Literal(value, datatype, lang)
def compile(self, viewcode_str, filename):
"""Compile the view code and return a code object
and dictionary of globals needed by the code object.
"""
viewcode = compile(viewcode_str, filename, 'exec')
# scan top-level code only for "import foo" and
# "from foo import *" and "from foo import bar, baz"
viewglobals = {'__builtins__': __builtins__}
for stmt in compiler.parse(viewcode_str).node:
if isinstance(stmt, Import):
modname, asname = stmt.names[0]
if asname is None:
asname = modname
viewglobals[asname] = __import__(modname)
elif isinstance(stmt, From):
fromlist = [x[0] for x in stmt.names]
module = __import__(stmt.modname, {}, {}, fromlist)
for name, asname in stmt.names:
if name == '*':
for starname in getattr(module, '__all__', dir(module)):
viewglobals[starname] = getattr(module, starname)
else:
if asname is None:
asname = name
viewglobals[asname] = getattr(module, name)
return viewcode, viewglobals
def find_executable_statements(self, text, exclude=None):
# Find lines which match an exclusion pattern.
excluded = {}
suite_spots = {}
if exclude:
reExclude = re.compile(exclude)
lines = text.split('\n')
for i in range(len(lines)):
if reExclude.search(lines[i]):
excluded[i+1] = 1
# Parse the code and analyze the parse tree to find out which statements
# are multiline, and where suites begin and end.
import parser
tree = parser.suite(text+'\n\n').totuple(1)
self.get_suite_spots(tree, suite_spots)
#print "Suite spots:", suite_spots
# Use the compiler module to parse the text and find the executable
# statements. We add newlines to be impervious to final partial lines.
statements = {}
ast = compiler.parse(text+'\n\n')
visitor = StatementFindingAstVisitor(statements, excluded, suite_spots)
compiler.walk(ast, visitor, walker=visitor)
lines = statements.keys()
lines.sort()
excluded_lines = excluded.keys()
excluded_lines.sort()
return lines, excluded_lines, suite_spots
def scan_python_file(filename, calls):
"""Scan a python file for gettext calls."""
def scan(nodelist):
for node in nodelist:
if isinstance(node, ast.CallFunc):
handle = False
for pos, n in enumerate(node):
if pos == 0:
if isinstance(n, ast.Name) and n.name in calls:
handle = True
elif pos == 1:
if handle:
if n.__class__ is ast.Const and \
isinstance(n.value, basestring):
yield n.lineno, n.value
break
else:
for line in scan([n]):
yield line
elif hasattr(node, '__iter__'):
for n in scan(node):
yield n
fp = file(filename)
try:
try:
return scan(parse(fp.read()))
except:
print >> sys.stderr, 'Syntax Error in file %r' % filename
finally:
fp.close()
def main(argv):
opar = optparse.OptionParser()
opar.add_option("-d", "--dot", dest="dot",
help="output a graphviz dot file", action="store_true")
opar.add_option("-m", "--min", dest="min",
help="minimum complexity for output", type="int",
default=2)
options, args = opar.parse_args(argv)
text = open(args[0], "rU").read() + '\n\n'
ast = parse(text)
visitor = PathGraphingAstVisitor()
visitor.preorder(ast, visitor)
if options.dot:
print('graph {')
for graph in visitor.graphs.values():
if graph.complexity() >= options.min:
graph.to_dot()
print('}')
else:
for graph in visitor.graphs.values():
if graph.complexity() >= options.min:
print(graph.name, graph.complexity())
def parse_python(self, lineno, gen, template):
"""
Convert the passed generator into a flat string representing
python sourcecode and return an ast node or raise a
TemplateSyntaxError.
"""
tokens = []
for t_lineno, t_token, t_data in gen:
if t_token == 'string':
# because some libraries have problems with unicode
# objects we do some lazy unicode processing here.
# if a string is ASCII only we yield it as string
# in other cases as unicode. This works around
# problems with datetimeobj.strftime()
# also escape newlines in strings
t_data = t_data.replace('\n', '\\n')
try:
str(t_data)
except UnicodeError:
tokens.append('u' + t_data)
continue
tokens.append(t_data)
source = '\xef\xbb\xbf' + (template % (u' '.join(tokens)).
encode('utf-8'))
try:
ast = parse(source, 'exec')
except SyntaxError, e:
raise TemplateSyntaxError('invalid syntax in expression',
lineno + (e.lineno or 0),
self.filename)
def _literal_eval(node_or_string):
"""
Safely evaluate an expression node or a string containing a Python
expression. The string or node provided may only consist of the following
Python literal structures: strings, numbers, tuples, lists, dicts, booleans,
and None.
"""
_safe_names = {'None': None, 'True': True, 'False': False}
if isinstance(node_or_string, basestring):
node_or_string = parse(node_or_string, mode='eval')
if isinstance(node_or_string, Expression):
node_or_string = node_or_string.node
def _convert(node):
if isinstance(node, Const) and isinstance(node.value, (basestring, int, float, long, complex)):
return node.value
elif isinstance(node, Tuple):
return tuple(map(_convert, node.nodes))
elif isinstance(node, List):
return list(map(_convert, node.nodes))
elif isinstance(node, Dict):
return dict((_convert(k), _convert(v)) for k, v in node.items)
elif isinstance(node, Name):
if node.name in _safe_names:
return _safe_names[node.name]
elif isinstance(node, UnarySub):
return -_convert(node.expr)
raise ValueError('malformed string')
return _convert(node_or_string)
def scan_python_file(filename, calls):
"""Scan a python file for gettext calls."""
def scan(nodelist):
for node in nodelist:
if isinstance(node, ast.CallFunc):
handle = False
for pos, n in enumerate(node):
if pos == 0:
if isinstance(n, ast.Name) and n.name in calls:
handle = True
elif pos == 1:
if handle:
if n.__class__ is ast.Const and \
isinstance(n.value, basestring):
yield n.lineno, n.value
break
else:
for line in scan([n]):
yield line
elif hasattr(node, '__iter__'):
for n in scan(node):
yield n
fp = file(filename)
try:
try:
return scan(parse(fp.read()))
except:
print >> sys.stderr, 'Syntax Error in file %r' % filename
finally:
fp.close()
def test_with_pyflakes(path='.'):
"""
Test code with Pyflakes
"""
import pyflakes.checker
exclude = 'ws-meta-in.py', 'test_syntax.py', 'test_point.py', 'test_pml.py'
cwd = os.getcwd()
top = os.path.join(os.path.dirname(__file__), '..')
os.chdir(top)
messages = []
for dirpath, dirnames, filenames in os.walk(path):
for filename in filenames:
if filename.endswith('.py') and filename not in exclude:
filename = os.path.join(dirpath, filename)
code = open(filename, 'U').read()
compile(code, filename, 'exec')
tree = compiler.parse(code)
checker = pyflakes.checker.Checker(tree, filename)
for m in checker.messages:
if (not m.filename.endswith('__init__.py')
or m.message != '%r imported but unused'):
messages += [m]
print m
os.chdir(cwd)
assert messages == []
return
def get_code_complexity(code, min=7, filename='stdin'):
complex = []
try:
ast = parse(code)
except AttributeError:
e = sys.exc_info()[1]
sys.stderr.write("Unable to parse %s: %s\n" % (filename, e))
return 0
visitor = PathGraphingAstVisitor()
visitor.preorder(ast, visitor)
for graph in visitor.graphs.values():
if graph is None:
# ?
continue
if graph.complexity() >= min:
complex.append(dict(
type = 'W',
lnum = graph.lineno,
text = '%s %r is too complex (%d)' % (
WARNING_CODE,
graph.entity,
graph.complexity(),
)
))
return complex
def parse_module(module_text, filename):
"""Return a module documentation tree from `module_text`."""
ast = compiler.parse(module_text)
token_parser = TokenParser(module_text)
visitor = ModuleVisitor(filename, token_parser)
compiler.walk(ast, visitor, walker=visitor)
return visitor.module
def test_with_pyflakes(path="."):
"""
Test code with Pyflakes
"""
import pyflakes.checker
exclude = "ws-meta-in.py", "test_syntax.py", "test_point.py", "test_pml.py"
cwd = os.getcwd()
top = os.path.join(os.path.dirname(__file__), "..")
os.chdir(top)
messages = []
for dirpath, dirnames, filenames in os.walk(path):
for filename in filenames:
if filename.endswith(".py") and filename not in exclude:
filename = os.path.join(dirpath, filename)
code = open(filename, "U").read()
compile(code, filename, "exec")
tree = compiler.parse(code)
checker = pyflakes.checker.Checker(tree, filename)
for m in checker.messages:
if not m.filename.endswith("__init__.py") or m.message != "%r imported but unused":
messages += [m]
print m
os.chdir(cwd)
assert messages == []
return
