Python. Strange class attributes behavior
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by Eugene
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Published on 2010-04-25T07:13:29Z
Indexed on
2010/04/25
7:23 UTC
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>>> class Abcd:
... a = ''
... menu = ['a', 'b', 'c']
...
>>> a = Abcd()
>>> b = Abcd()
>>> a.a = 'a'
>>> b.a = 'b'
>>> a.a
'a'
>>> b.a
'b'
It's all correct and each object has own 'a', but...
>>> a.menu.pop()
'c'
>>> a.menu
['a', 'b']
>>> b.menu
['a', 'b']
How could this happen? And how to use list as class attribute?
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