Fastest-in term of space- way to find prime numbers with python

Question

Maybe it is a stupid question, but i was wondering if you could provide the shortest source to find prime numbers with Python. I was also wondering how to find prime numbers

Answer 1

Since one can just cut and paste the first million primes from the net:

map(int,open('primes.txt'))

This is a somewhat similar to the question I asked yesterday where wim provided a fairly short answer:

is this primes generator pythonic