False positives for unsupported-binary-operation

[pylint-bot]

Originally reported by: Claudiu Popa (BitBucket: PCManticore, GitHub: @PCManticore?)

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#!python

# The tuple is iterable, it should work
lines = []
lines += (1, 2, 3) 

Of course, the lack of understanding flow controls leads to spurious false positives for this situation as well.

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• Bitbucket: https://bitbucket.org/logilab/astroid/issue/139

[pylint-bot]

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

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As an example of an error caused by the lack of understanding flow control:

#!python

 if isinstance(default, tuple):
       return default + (n, )
   else:
       return default + [n] # thinks its tuple