AttributeError: 'Module' object has no attribute '_type'

[pylint-bot]

Originally reported by: Brian Lane (BitBucket: bcl, GitHub: @bcl?)

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We have this bug report in Fedora - https://bugzilla.redhat.com/show_bug.cgi?id=1125259

It looks like the Method class is missing a _type attribute.

#!python

Version-Release number of selected component:
pylint-1.2-6.fc20

Additional info:
reporter:       libreport-2.2.3
cmdline:        /usr/bin/python /usr/bin/pylint '--msg-template={path}:{line}: [{msg_id}] {msg}' -r n scenarios/Apache.py --disable=C0103,W1201
dso_list:       python-astroid-1.1-3.fc20.noarch
executable:     /usr/bin/pylint
kernel:         3.14.4-200.fc20.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
scoped_nodes.py:686:_is_metaclass:AttributeError: 'Module' object has no attribute '_type'

Traceback (most recent call last):
  File "/usr/bin/pylint", line 9, in <module>
    load_entry_point('pylint==1.2.0', 'console_scripts', 'pylint')()
  File "/usr/lib/python2.7/site-packages/pylint/__init__.py", line 21, in run_pylint
    Run(sys.argv[1:])
  File "/usr/lib/python2.7/site-packages/pylint/lint.py", line 1047, in __init__
    linter.check(args)
  File "/usr/lib/python2.7/site-packages/pylint/lint.py", line 626, in check
    self.check_astroid_module(astroid, walker, rawcheckers, tokencheckers)
  File "/usr/lib/python2.7/site-packages/pylint/lint.py", line 712, in check_astroid_module
    walker.walk(astroid)
  File "/usr/lib/python2.7/site-packages/pylint/utils.py", line 715, in walk
    self.walk(child)
  File "/usr/lib/python2.7/site-packages/pylint/utils.py", line 712, in walk
    cb(astroid)
  File "/usr/lib/python2.7/site-packages/pylint/checkers/classes.py", line 249, in visit_class
    if node.type == 'class':
  File "/usr/lib/python2.7/site-packages/astroid/scoped_nodes.py", line 702, in _class_type
    if _is_metaclass(klass):
  File "/usr/lib/python2.7/site-packages/astroid/scoped_nodes.py", line 686, in _is_metaclass
    if baseobj._type == 'metaclass':
AttributeError: 'Module' object has no attribute '_type'

Local variables in innermost frame:
baseobj: <Module(scenarios.GenericTest) l.0 [scenarios.GenericTest] at Ox139f710>
base: <Name(GenericTest) l.12 [scenarios.Apache] at Ox109d150>
klass: <Class(Apache) l.12 [scenarios.Apache] at Ox10a2350>

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• Bitbucket: https://bitbucket.org/logilab/astroid/issue/45

[pylint-bot]

Original comment by Claudiu Popa (BitBucket: PCManticore, GitHub: @PCManticore):

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Does this replicate with Astroid 1.2?

[pylint-bot]

Original comment by Brian Lane (BitBucket: bcl, GitHub: @bcl?):

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I don't have any way to check, but from looking at the current code in astroid I don't see _type set on Module and the _is_metaclass code looks the same. Are there other changes that may prevent it from getting that far?

[pylint-bot]

Original comment by Claudiu Popa (BitBucket: PCManticore, GitHub: @PCManticore):

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Well, only Class nodes should be processed by _is_metaclass. Could you provide a small sample that reproduces the code?

[pylint-bot]

Original comment by Andrew Kuchev (BitBucket: 4soon):

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I have similar problem when checking the following code:

#!python

def decor(f):
    return f


class Foo:
    @decor
    def prop(self):
        pass


if __name__ == '__main__':
    f = Foo()
    f.prop = 42

The stacktrace is:

#!python

$ pylint main.py
No config file found, using default configuration
************* Module main
C: 13, 0: Final newline missing (missing-final-newline)
C:  1, 0: Missing module docstring (missing-docstring)
W:  1,10: Redefining name 'f' from outer scope (line 12) (redefined-outer-name)
C:  1, 0: Invalid argument name "f" (invalid-name)
C:  1, 0: Missing function docstring (missing-docstring)
C:  5, 0: Missing class docstring (missing-docstring)
W:  5, 0: Class has no __init__ method (no-init)
C:  7, 4: Missing method docstring (missing-docstring)
Traceback (most recent call last):
  File "/usr/bin/pylint", line 9, in <module>
    load_entry_point('pylint==1.3.0', 'console_scripts', 'pylint')()
  File "/usr/lib/python3.4/site-packages/pylint-1.3.0-py3.4.egg/pylint/__init__.py", line 21, in run_pylint
    Run(sys.argv[1:])
  File "/usr/lib/python3.4/site-packages/pylint-1.3.0-py3.4.egg/pylint/lint.py", line 991, in __init__
    linter.check(args)
  File "/usr/lib/python3.4/site-packages/pylint-1.3.0-py3.4.egg/pylint/lint.py", line 585, in check
    self.check_astroid_module(astroid, walker, rawcheckers, tokencheckers)
  File "/usr/lib/python3.4/site-packages/pylint-1.3.0-py3.4.egg/pylint/lint.py", line 662, in check_astroid_module
    walker.walk(astroid)
  File "/usr/lib/python3.4/site-packages/pylint-1.3.0-py3.4.egg/pylint/utils.py", line 804, in walk
    self.walk(child)
  File "/usr/lib/python3.4/site-packages/pylint-1.3.0-py3.4.egg/pylint/utils.py", line 804, in walk
    self.walk(child)
  File "/usr/lib/python3.4/site-packages/pylint-1.3.0-py3.4.egg/pylint/utils.py", line 801, in walk
    cb(astroid)
  File "/usr/lib/python3.4/site-packages/pylint-1.3.0-py3.4.egg/pylint/checkers/classes.py", line 347, in visit_function
    if overridden_frame.type == 'method':
AttributeError: 'Module' object has no attribute 'type'

Version:

$ pylint --version
No config file found, using default configuration
pylint 1.3.0, 
astroid 1.2.0, common 0.62.1
Python 3.4.1 (default, May 19 2014, 17:23:49) 
[GCC 4.9.0 20140507 (prerelease)]

[pylint-bot]

Original comment by Claudiu Popa (BitBucket: PCManticore, GitHub: @PCManticore):

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Thanks, Andrew, I fixed that in https://bitbucket.org/logilab/pylint/commits/e9ae6b39983942a2d47b2725458aca988ebd93ff. Unfortunately, it's not the same as the other failure.

[pylint-bot]

Original comment by Claudiu Popa (BitBucket: PCManticore, GitHub: @PCManticore):

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Since there's no way to reproduce this, I'll close the issue in the mean time.