Sieve of Eratosthenes

sieveEratosthenes.py

def sieveEratosthenes(limit):
    '''Return all primes below the limit'''
    numbers = range(3,limit,2)
    primes = [2]
    while True:
        prime = numbers.pop(0)
        primes.append(prime)
        for n in range(prime**2, limit, 2*prime):
            try:
                numbers.remove(n)
            except ValueError:
                pass
        if prime**2 > limit:
            primes.extend(numbers)
            break
    return primes