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I'm getting many pylint false positive and it seems so ordinary that I cannot imagine it hasn't been solved yet :-/

The following code generates a false positive in pylint since it does not recognise keyword arguments correctly:

class A:
    def __init__(self, *t, x=None):
        if x==1:  # E0601, using variable 'x' before assignment
            x=2
        print(x)

A(x=1)

This is usually due to pylint misinterpreting keyword arguments after a *. Do you know if pylint is still active, where to report it, or how to find if someone has patched this yet? I cannot find something helpful with google :( Maybe by chance, someone knows a patch as it seems to ordinary...

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3 Answers 3

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This isn't actually valid Python (at least in 2.x). Specific keyword arguments must go before *args and **kwargs. You'll see an error if you try to paste this into the Python shell. It should look like this:

def __init__(self, x=None, *t):
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3 Comments

def __init__(self, *t, x=None) is perfectly valid in Python 3. x is known as a keyword-only argument. See PEP 3102.
Oh, does that mean I'm using Python 3 specials?
@MariusGedminas I wasn't aware of that. Edited to clarify that my answer applies to 2.x only.
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Do you know if pylint is still active, where to report it, or how to find if someone has patched this yet?

I lurk in the mailing list for Pylint and other logilab projects. It's not very active, but it's not dead yet.

Pylint's bug tracker can be found at http://www.logilab.org/857

There's also an IRC channel mentioned on Pylint's project page: #pylint on FreeNode.

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Oh, so what's correct the way to report it and is there any chance of this getting fixed any time? :)
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Pylint is not dead at all! The best way to report pb is to file ticket on http://www.logilab.org/project/pylint or the [email protected] mailing-list. IRC is fine but is not the preferred way.

Python 3 support is slowly moving on as we don't use it that much yet at Logilab. But as in other open source project, patches are warmly welcome.

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