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authorbrenda-br2023-02-23 22:14:39 +0530
committerbrenda-br2023-02-23 22:14:39 +0530
commitd476d2e053f937c0060f696312f301591e4f43ea (patch)
tree5d1643ba487082f986d8cc1868fba482293f1e37 /venv/Lib/site-packages/astroid/mixins.py
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-# Copyright (c) 2010-2011, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
-# Copyright (c) 2014-2016, 2018 Claudiu Popa <pcmanticore@gmail.com>
-# Copyright (c) 2014 Google, Inc.
-# Copyright (c) 2014 Eevee (Alex Munroe) <amunroe@yelp.com>
-# Copyright (c) 2015-2016 Ceridwen <ceridwenv@gmail.com>
-# Copyright (c) 2015 Florian Bruhin <me@the-compiler.org>
-# Copyright (c) 2016 Jakub Wilk <jwilk@jwilk.net>
-# Copyright (c) 2018 Nick Drozd <nicholasdrozd@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 itertools
-
-from astroid import decorators
-from astroid import exceptions
-
-
-class BlockRangeMixIn:
- """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:
- """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
-
-
-class AssignTypeMixin:
- def assign_type(self):
- return self
-
- 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()
-
-
-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,
- )
-
-
-class MultiLineBlockMixin:
- """Mixin for nodes with multi-line blocks, e.g. For and FunctionDef.
- Note that this does not apply to every node with a `body` field.
- For instance, an If node has a multi-line body, but the body of an
- IfExpr is not multi-line, and hence cannot contain Return nodes,
- Assign nodes, etc.
- """
-
- @decorators.cachedproperty
- def _multi_line_blocks(self):
- return tuple(getattr(self, field) for field in self._multi_line_block_fields)
-
- def _get_return_nodes_skip_functions(self):
- for block in self._multi_line_blocks:
- for child_node in block:
- if child_node.is_function:
- continue
- yield from child_node._get_return_nodes_skip_functions()
-
- def _get_yield_nodes_skip_lambdas(self):
- for block in self._multi_line_blocks:
- for child_node in block:
- if child_node.is_lambda:
- continue
- yield from child_node._get_yield_nodes_skip_lambdas()
-
- @decorators.cached
- def _get_assign_nodes(self):
- children_assign_nodes = (
- child_node._get_assign_nodes()
- for block in self._multi_line_blocks
- for child_node in block
- )
- return list(itertools.chain.from_iterable(children_assign_nodes))
-
-
-class NoChildrenMixin:
- """Mixin for nodes with no children, e.g. Pass."""
-
- def get_children(self):
- yield from ()