When is not a good time to use python generators?

Question

This is rather the inverse of What can you use Python generator functions for?: python generators, generator expressions, and the itertools module are some of m

Answer 1

Profile, Profile, Profile.

Profiling your code is the only way to know if what you're doing has any effect at all.

Most usages of xrange, generators, etc are over static size, small datasets. It's only when you get to large datasets that it really makes a difference. range() vs. xrange() is mostly just a matter of making the code look a tiny little bit more ugly, and not losing anything, and maybe gaining something.

Profile, Profile, Profile.