given a digit number print all of the possible strings you can make with it using the corresponding letters on the numbers

perms.py

#!/usr/bin/env python
import sys


digit_map = {
	'2': 'abc',
	'3': 'def',
	'4': 'ghi',
	'5': 'jkl',
	'6': 'mno',
	'7': 'pqrs',
	'8': 'tuv',
	'9': 'wxyz',
}

def word_numbers(input):
	input = str(input)
	ret = ['']
	for char in input:
		letters = digit_map.get(char, '')
		ret = [prefix+letter for prefix in ret for letter in letters]
	return ret
  
def main():
	print word_numbers(23)
	
	
if __name__ == '__main__':
	status = main()
	sys.exit(status)