classes which implement slicing must now do runtime type-checking inside __getitem__.
Just in case you thought that they wouldn't have to do runtime type-checking otherwise:
>>> class C(object): ... def __getitem__(self, x): ... print type(x), x ... >>> c = C() >>> c[1] <type 'int'> 1 >>> c[1:2] <type 'slice'> slice(1, 2, None) >>> c[1:2:-1] <type 'slice'> slice(1, 2, -1) >>> c[1,2] <type 'tuple'> (1, 2) >>> c[1,2:3] <type 'tuple'> (1, slice(2, 3, None)) >>> c['1'] <type 'str'> 1 >>> c[[]] <type 'list'> []
You can put just about anything in a __getitem__ call. Do you really want a method for each of the variants above?
Steve -- http://mail.python.org/mailman/listinfo/python-list
