prime.py

import argparse

parser = argparse.ArgumentParser(
    description='Print prime factors of number[s]'
)

parser.add_argument('num', type=int, nargs='*')

args = parser.parse_args()
nums = args.num

def factors(n):
    curr = n
    i = 2
    factors = []
    while i <= n / 2:
        if curr % i == 0:
            curr /= i
            factors.append(i)
        else:
            i += 1
    return factors or [1, n]

for n in nums:
    print(repr(factors(n))[1:-1])