Starcraft CD-Key Validator

sckey.py

from sys import argv

def validate(key):
	magic = 3
	count = 0
	for c in key:
		if not c.isdigit():
			continue
		v = int(c)
		count += 1
		if count == 13:
			return(magic % 10 == v)
		else:
			v ^= magic * 2
			magic += v

def main()
	if (len(argv) == 1)
		# self-test.
		if not validate("0000-00000-0003"):
			return(False)
		if not validate("1234-56789-0123"):
			return(False)
		if not validate("1337-42069-0008"):
			return(False)
		if not validate("1998-00000-1997"):
			return(False)
		if not validate("3333-33333-3333"):
			return(False)
		return(True)

	for i in argv:
		validate(i)

if __name__ == "__main__":
    main()