product_key.py

import random
import sys

def product_key():
    all_keys = []
    #Check Arguments
    if len(sys.argv) == 2:
        total_keys =  int(sys.argv[1])
    else:
        print "Esta funcion requiere como 1 argumento"
        return 0

    
    for key in range(total_keys):
        current_key = None
        while not current_key  and current_key not in all_keys:
            current_key = generate_key()
            all_keys.append(current_key)

    for key in all_keys:
        print key

def generate_key():
    groups, length = 5,5
    generated_key = []
    for group in range(groups):
        temp = ''
        for digit in range(length):
            temp += return_char(random.randint(1,15))
        generated_key.append(temp)
    return '-'.join(generated_key) 


def return_char(digit):
    if digit < 10 :
        return str(digit)
    elif digit < 16:
        return chr(64 + digit - 9)
    else:
        return '0'
        
if __name__ == "__main__":
    product_key()