Re: __getitem__ method on (meta)classes

[Leif K-Brooks]

[EMAIL PROTECTED] wrote:
Why doesn't this work?

def foo(lst):
...   class baz(object):
...     def __getitem__(cls, idx): return cls.lst[idx]
...     __getitem__=classmethod(__getitem__)
...   baz.lst = lst
...   return baz
...
I thought x[y] and x.__getitem__(y) were supposed to always be
synonymous.
No, with new-style classes, x[y] and type(x).__getitem__(y) are 
synonymous. This works:

>>> def foo(lst):
...  class bar(type):
...   def __getitem__(self, index):
...    return self.lst[index]
...  class baz(object):
...   __metaclass__ = bar
...  baz.lst = lst
...  return baz
...
>>> foo([1,2,3])[0]
1
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