False positive E1120 no-value-for-parameter for class method

[pylint-bot]

Originally reported by: BitBucket: mitar, GitHub: @mitar?

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I have the following code:

#!python
class DisplayComponent(components.FrontendComponent):
    @classmethod
    def get_urls(cls):
        return super(DisplayComponent, cls).get_urls()

And pylint complains that "No value passed for parameter 'cls' in function call". Which is of course wrong as this is done automatically.

pylint 0.28.0,
astng 0.24.3, common 0.59.1

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• Bitbucket: https://bitbucket.org/logilab/pylint/issue/40

[pylint-bot]

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

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mitar, is this still a problem? I cannot reproduce it with pylint 1.1, astroid 1.0.1, common 0.60.1.

[pylint-bot]

Original comment by BitBucket: mitar, GitHub: @mitar?:

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Oh. After more testing I discovered that I misattributed the problem. It seems I didn't read the lines correctly. The whole function is:

#!python
class DisplayComponent(components.FrontendComponent):
    @classmethod
    def get_urls(cls):
        return super(DisplayComponent, cls).get_urls() + urls.patterns(
            '',

            urls.url(r'^node/(?P<pk>[^/]+)/$', views.DisplayNode.as_view(), name='node'),
        )

And it fails at the views.DisplayNode.as_view() call. The reason for this is, it seems, because as_view is decorated with classonlymethod and not classmethod. See:

https://github.com/django/django/blob/master/django/utils/decorators.py#L8
https://github.com/django/django/blob/master/django/views/generic/base.py#L47

[pylint-bot]

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

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Solved in astroid with https://bitbucket.org/logilab/astroid/commits/30cd4b487741674c7cfc0a75b09ed693955cbbc1.