Create list of single item repeated N times

Question

I want to create a series of lists, all of varying lengths. Each list will contain the same element e, repeated n times (where n = len

Answer 1

Itertools has a function just for that:

import itertools
it = itertools.repeat(e,n)

Of course itertools gives you a iterator instead of a list. [e] * n gives you a list, but, depending on what you will do with those sequences, the itertools variant can be much more efficient.