печально быть антисоциальным - Post a comment

smejmoon

01:08 pm

>>> def something(x = []):
...   x += ['foo']
...   return x
...  
>>> something()
['foo']
>>> something()
['foo', 'foo']
>>> something()
['foo', 'foo', 'foo']
>>> something([1])
[1, 'foo']
>>> something()
['foo', 'foo', 'foo', 'foo']