On Mon, 19 Mar 2007 19:48:37 +1100, Ben Finney wrote: > It's also best to inherit every class from another class, leading to a > single hierarchy for all classes and types. 'object' is the one to > choose if you don't want the behaviour of any other class.
What's wrong with old-style classes? On the plus side: - Why inherit from something if you don't need to? - Less typing. - Attribute-lookup is much faster, perhaps as much as twice as fast. http://www.python.org/~jeremy/weblog/030506.html - Documentation on old style classes is more extensive. - You can't use new style classes for exceptions. On the minus side: - Properties don't work as you expect them too. - Slots don't work at all. In other words, the only reason why you HAVE to use a new style class is that you need properties or __slots__. You might WANT to use a new style class to inherit from built-in types. Otherwise, the choice between old and new is not very important. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
