print all combinations of 2D string array

printAllCombinationsString.py

# author : huklee
# source : JTD 2017-03-05
# print all combinations of string 2D array

def printComb(a, sl):
	s = ""
	for i in range(len(a)):
		s += sl[i][a[i]]
	return s

def increment(a, sl):
	for i in range(len(a))[::-1]:
		a[i] += 1
		if a[i] == len(sl[i]):
			a[i] = 0
			continue
		break
	return a

def printAll(sl):
	a = [0 for x in sl]
	endCond = [len(x) - 1 for x in sl]
	while True:
		# print each combination
		print(printComb(a, sl))
		
		if a == endCond:
			break
		# increment the combination
		a = increment(a, sl)
				

d = [["A", "B", "C"], ["X", "Y", "Z"], ["1", "2", "3"]]
printAll(d)