memory allocation for Python list

[bearophileHUGS at lycos.com]

dmitrey:
> As I have mentioned, I don't know final length of the list, but
> usually I know a good approximation, for example 400.

There is no reserve()-like method, but this is a fast enough operation
you can do at the beginning:

l = [None] * 400

It may speed up your code, but the final resizing may kill your
performance anyway. You can try it. Just using Psyco is probably
better.

Bye,
bearophile