On Fri, Aug 29, 2008 at 6:15 PM, Nick Coghlan <ncoghlan at gmail.com> wrote: > The mixin methods in the ABC machinery would be a lot less useful > without multiple inheritance (and the collections ABCs would be a whole > lot harder to define and to write). > > So if you're looking for use cases for multiple inheritance, I'd suggest > starting with the Python 2.6 collections module and seeing how you would > go about rewriting it using only single inheritance. I believe the new > io module is also fairly dependent on multiple inheritance. I am very well aware of the collection module and the ABC mechanism. However, you are missing that mixins can be implemented in a single-inheritance world without the complications of the MRO. See my answer to Alex Martelli in this same thread.
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