Updated sieve.py to output list of primes when run.
Updated sieve.py to output list of primes when run.

Main sequence was not updated when the sieve method was converted to a generator.

Signed-off-by: Ephphatha <c8d2f131b08ba393ae40d299f9d9ee0f39994494@thelettereph.com>

Ephphatha/Project-Euler