[PYTHON MATRIX-SIG] inconsistency in array()?

[Jim Hugunin]

Tom Short writes:
> >I hadn't checked out UserArray closely enough (I don't use it 
personally).
> > Yours looks like a good improvement and if I don't hear any complaints
> >about it on the list, I'll adopt it into the next release.
>
> What is the purpose of UserArray? What does it allow that an Array 
doesn't?

UserArray is a python class that behaves as much as possible like the lower 
level array objects that are in C.  The main advantage to UserArray is that 
it can be subclassed to provide particular behaviors, while still behaving 
as a normal array wherever possible.

The simplest example of the use of UserArray is the Matrix class that 
behaves like the built-in array objects in most ways, but that reimplements 
the multiply operation to do "real" matrix multiplies rather than the 
normal element-wise multiplications.

I hope this answers your question - Jim


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