Sion Arrowsmith wrote:
In article <[EMAIL PROTECTED]>, Mike Meyer <[EMAIL PROTECTED]> wrote:
And before Python 2.2 there was the UserList class in the standard
library. Which is still there in 2.4. Shouldn't it be depreciated by
this point?
Apart from compatibility issues as mentioned in the UserList
documentation, deriving from it will give you a classic class,
whereas deriving from list will give you a new style class.
There may be circumstances under which this is important
(exercise left to more twisted minds than mine). Same applies
to dict/UserDict.
Additionally, as I understand it UserList and UserDict are implemented entirely in Python, which means that there can be significant performance differences as well. There's very little benefit to UserList/UserDict now that builtins can be subclassed, and I believe that they are still there only as a matter of backward compatibility.
Jeff Shannon Technician/Programmer Credit International
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