modutils _module_file ignores pkg_resources.declare_namespace

[pylint-bot]

Originally reported by: Adam Groszer (BitBucket: agroszer, GitHub: @agroszer?)

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z3c packages use a variation of

#!python

try:
    # Declare this a namespace package if pkg_resources is available.
    import pkg_resources
    pkg_resources.declare_namespace('z3c')
except ImportError:
    pass

zope packages use

#!python

# this is a namespace package
try:
    import pkg_resources
    pkg_resources.declare_namespace(__name__)
except ImportError:
    import pkgutil
    __path__ = pkgutil.extend_path(__path__, __name__)

astroid has a workaround that checks for pkgutil.extend_path but not for pkg_resources.declare_namespace (in modutils.py def _module_file). That's why z3c packages are import-error despite being on PYTHONPATH

Any chance to get pkg_resources.declare_namespace checking?

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• Bitbucket: https://bitbucket.org/logilab/astroid/issue/243

[pylint-bot]

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

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We do have a fix for declare_namespace (https://bitbucket.org/logilab/astroid/src/220d7a368bcf4fb12deffa07acd309135aa724bd/astroid/modutils.py?at=default&fileviewer=file-view-default#modutils.py-686), but we need to figure out why it's not caught.

[pylint-bot]

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

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Ah, it's declare_namespace(__name__).

[pylint-bot]

Original comment by Adam Groszer (BitBucket: agroszer, GitHub: @agroszer?):

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yah vs. declare_namespace('z3c')

[pylint-bot]

Original comment by Borys Pierov (BitBucket: Ashald, GitHub: @Ashald?):

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So when we can expect this (the fix mentioned above) to be released? I have astroid==1.3.8 and it doesn't have the code.

[pylint-bot]

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

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This particular issue has no fix, I didn't have time to work on it. The one where support for declare_name(__name__) was added will be released shortly with pylint 1.5.0 / astroid 1.4.0. When exactly, I don't know. I'm going to start cherry-picking changes from default to 1.4.0 this week, but I have no idea when it will be finished.

[pylint-bot]

Original comment by Borys Pierov (BitBucket: Ashald, GitHub: @Ashald?):

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Great, so I will be waiting for pylint 1.5.0 / astroid 1.4.0 release - thanks!

P.S.: I was talking about fix for declare_namespace(__name__)