/usr/lib/python2.7/dist-packages/astroid/mixins.py is in python-astroid 1.6.0-1.
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# Copyright (c) 2014 Google, Inc.
# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""This module contains some mixins for the different nodes.
"""
import warnings
from astroid import decorators
from astroid import exceptions
class BlockRangeMixIn(object):
"""override block range """
@decorators.cachedproperty
def blockstart_tolineno(self):
return self.lineno
def _elsed_block_range(self, lineno, orelse, last=None):
"""handle block line numbers range for try/finally, for, if and while
statements
"""
if lineno == self.fromlineno:
return lineno, lineno
if orelse:
if lineno >= orelse[0].fromlineno:
return lineno, orelse[-1].tolineno
return lineno, orelse[0].fromlineno - 1
return lineno, last or self.tolineno
class FilterStmtsMixin(object):
"""Mixin for statement filtering and assignment type"""
def _get_filtered_stmts(self, _, node, _stmts, mystmt):
"""method used in _filter_stmts to get statements and trigger break"""
if self.statement() is mystmt:
# original node's statement is the assignment, only keep
# current node (gen exp, list comp)
return [node], True
return _stmts, False
def assign_type(self):
return self
def ass_type(self):
warnings.warn('%s.ass_type() is deprecated and slated for removal '
'in astroid 2.0, use %s.assign_type() instead.'
% (type(self).__name__, type(self).__name__),
PendingDeprecationWarning, stacklevel=2)
return self.assign_type()
class AssignTypeMixin(object):
def assign_type(self):
return self
def ass_type(self):
warnings.warn('%s.ass_type() is deprecated and slated for removal '
'in astroid 2.0, use %s.assign_type() instead.'
% (type(self).__name__, type(self).__name__),
PendingDeprecationWarning, stacklevel=2)
return self.assign_type()
def _get_filtered_stmts(self, lookup_node, node, _stmts, mystmt):
"""method used in filter_stmts"""
if self is mystmt:
return _stmts, True
if self.statement() is mystmt:
# original node's statement is the assignment, only keep
# current node (gen exp, list comp)
return [node], True
return _stmts, False
class ParentAssignTypeMixin(AssignTypeMixin):
def assign_type(self):
return self.parent.assign_type()
def ass_type(self):
warnings.warn('%s.ass_type() is deprecated and slated for removal '
'in astroid 2.0, use %s.assign_type() instead.'
% (type(self).__name__, type(self).__name__),
PendingDeprecationWarning, stacklevel=2)
return self.assign_type()
class ImportFromMixin(FilterStmtsMixin):
"""MixIn for From and Import Nodes"""
def _infer_name(self, frame, name):
return name
def do_import_module(self, modname=None):
"""return the ast for a module whose name is <modname> imported by <self>
"""
# handle special case where we are on a package node importing a module
# using the same name as the package, which may end in an infinite loop
# on relative imports
# XXX: no more needed ?
mymodule = self.root()
level = getattr(self, 'level', None) # Import as no level
if modname is None:
modname = self.modname
# XXX we should investigate deeper if we really want to check
# importing itself: modname and mymodule.name be relative or absolute
if mymodule.relative_to_absolute_name(modname, level) == mymodule.name:
# FIXME: we used to raise InferenceError here, but why ?
return mymodule
return mymodule.import_module(modname, level=level,
relative_only=level and level >= 1)
def real_name(self, asname):
"""get name from 'as' name"""
for name, _asname in self.names:
if name == '*':
return asname
if not _asname:
name = name.split('.', 1)[0]
_asname = name
if asname == _asname:
return name
raise exceptions.AttributeInferenceError(
'Could not find original name for {attribute} in {target!r}',
target=self, attribute=asname)
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