#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' a test module '
__author__ = 'Michael Bob'
import sys
def test():
args = sys.argv
if len(args)==1:
print('Hello, world!')
elif len(args)==2:
print('Hello, %s!' % args[1])
else:
print('Too many arguments!')
if __name__=='__main__':
test()
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