python: get number of items from list(sequence) with certain condition

Question

Assuming that I have a list with huge number of items.

l = [ 1, 4, 6, 30, 2, ... ]

I want to get the number of items from that list, where

Answer 1

you could do something like:

l = [1,2,3,4,5,..]
count = sum(1 for i in l if my_condition(i))

which just adds 1 for each element that satisfies the condition.