Mercurial > hg > config
view python/mutable_defaults.py @ 596:c5537e841c78
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author | Jeff Hammel <k0scist@gmail.com> |
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date | Wed, 29 Jan 2014 11:12:09 -0800 |
parents | 434c65593612 |
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#!/usr/bin/env python # see also: http://www.daniweb.com/software-development/python/threads/66697 class Foo(object): def __init__(self, mutable=['default']): self.foo = mutable self.foo.append(1) if __name__ == '__main__': bar = Foo() print len(bar.foo) fleem = Foo() print len(fleem.foo) assert len(fleem.foo) == 2, "Don't use default mutable arguments!"