Covert a string as a command line argument to binary

cli_to_bin.py

#!/usr/bin/python
import sys

def to_bin(st):
  return ' '.join(format(ord(x), 'b') for x in st)

def main(argv):
    for x in argv[1:]:
        print to_bin(x)

if __name__ == "__main__":
    main(sys.argv)