Incorrect inference of ancestors of Enum class with six.with_metaclass #713
Description
Steps to reproduce
import astroid
code = '''import six
from enum import Enum, EnumMeta
class FooMeta(EnumMeta):
pass
class Foo(six.with_metaclass(FooMeta, Enum)):
bar = 1'''
module = astroid.parse(code)
print(list(module.body[3].ancestors()))Current behavior
Prints [<ClassDef.NoneType l.0 at 0x102bb4d68>, <ClassDef.object l.0 at 0x102bbe1d0>]
Expected behavior
Prints [<ClassDef.Enum l.10 at 0x10d0617b8>, <ClassDef.object l.0 at 0x10c4650f0>]
With another simple example without enums works ok:
import astroid
code = '''import six
class FooMeta(type):
pass
class BaseFoo(object):
pass
class Foo(six.with_metaclass(FooMeta, BaseFoo)):
bar = 1'''
module = astroid.parse(code)
print(list(module.body[3].ancestors()))Prints: [<ClassDef.BaseFoo l.6 at 0x1091531d0>, <ClassDef.object l.0 at 0x10853d128>]
python -c "from astroid import __pkginfo__; print(__pkginfo__.version)" output
2.3.2
This behaviour breaks pylint with exception:
Traceback (most recent call last):
File "bin/pylint", line 8, in <module>
sys.exit(run_pylint())
File "lib/python3.7/site-packages/pylint/__init__.py", line 19, in run_pylint
Run(sys.argv[1:])
File "lib/python3.7/site-packages/pylint/lint.py", line 1394, in __init__
linter.check(args)
File "lib/python3.7/site-packages/pylint/lint.py", line 801, in check
self._do_check(files_or_modules)
File "lib/python3.7/site-packages/pylint/lint.py", line 938, in _do_check
self.check_astroid_module(ast_node, walker, rawcheckers, tokencheckers)
File "lib/python3.7/site-packages/pylint/lint.py", line 1018, in check_astroid_module
walker.walk(ast_node)
File "lib/python3.7/site-packages/pylint/utils.py", line 1162, in walk
self.walk(child)
File "lib/python3.7/site-packages/pylint/utils.py", line 1162, in walk
self.walk(child)
File "lib/python3.7/site-packages/pylint/utils.py", line 1162, in walk
self.walk(child)
File "lib/python3.7/site-packages/pylint/utils.py", line 1159, in walk
cb(astroid)
File "lib/python3.7/site-packages/pylint/checkers/base.py", line 1509, in visit_assignname
if not list(frame.local_attr_ancestors(node.name)):
File "lib/python3.7/site-packages/astroid/scoped_nodes.py", line 2197, in local_attr_ancestors
if name in astroid:
TypeError: argument of type 'Const' is not iterable