In message <5f6eceec-1eef-4db7-82a6-e5f553349...@k22g2000yqh.googlegroups.com>, Ian wrote:
> It seems to me that there is a rather simple case to be made for > allowing mutable default arguments: instances of user-defined classes > are fundamentally mutable. Disallowing mutable default arguments > would mean disallowing instances of user-defined classes entirely. > That would be excessive and would violate Python's general rule of > staying out of the programmer's way. Unless you offered a way for user-defined classes to declare that they were immutable. -- http://mail.python.org/mailman/listinfo/python-list
