#! /usr/local/bin/python3
'''hello.py: le programme 'Hello world' bien connu.

Usage: hello.py [-h] [--help] [nom_de_personne]+
'''

import sys, getopt

def usage():
  'Print usage doc and exit.'
  print (__doc__)
  sys.exit()

def hello(arg):
  print  ('Hello %s!' % arg)



if __name__ == '__main__':

  try:
    optlist, arglist = getopt.getopt(sys.argv[1:], 'h', ['help'])
  except:
    usage()

  for option in optlist:
    if option[0] in ['-h', '--help']: usage()
  if arglist:
    for arg in arglist: hello(arg)
  else: usage()