#!/usr/bin/env python3
# -*- coding: utf-8 -*-

'''
A template for writing Python application with MIT license.
Latest version can be found at https://github.com/letuananh/pydemo

References:
	Python documentation:
		https://docs.python.org/
	argparse module:
		https://docs.python.org/2/howto/argparse.html
	PEP 257 - Python Docstring Conventions:
		https://www.python.org/dev/peps/pep-0257/

@author: Le Tuan Anh <tuananh.ke@gmail.com>
'''

# Copyright (c) 2015, Le Tuan Anh <tuananh.ke@gmail.com>
#
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.

__author__ = "Le Tuan Anh <tuananh.ke@gmail.com>"
__copyright__ = "Copyright 2015, pydemo"
__credits__ = [ "Le Tuan Anh" ]
__license__ = "MIT"
__version__ = "0.1"
__maintainer__ = "Le Tuan Anh"
__email__ = "<tuananh.ke@gmail.com>"
__status__ = "Prototype"

########################################################################

import sys
import os
import argparse

########################################################################

def echo(input_str):
	print(input_str)

########################################################################

def main():
	'''Main entry of this demo application.
	'''

	# It's easier to create a user-friendly console application by using argparse
	# See reference at the top of this script
	parser = argparse.ArgumentParser(description="Display a line of text.")
	
	# Positional argument(s)
	parser.add_argument('input', help='The string to be printed.')

	# Optional argument(s)
	group = parser.add_mutually_exclusive_group()
	group.add_argument("-v", "--verbose", action="store_true")
	group.add_argument("-q", "--quiet", action="store_true")

	# Main script
	if len(sys.argv) == 1:
		# User didn't pass any value in, show help
		parser.print_help()
	else:
		# Parse input arguments
		args = parser.parse_args()
		# Now do something ...
		if args.verbose:
			print("You have activated my talkative mode ...")
		if args.input:
			echo(args.input)
		elif not args.quiet:
			print("Eh, I have nothing to print (You can shut me up by passing in the option -q) ...")
		if args.verbose:
			print("Bye sweetie ...")
	pass

if __name__ == "__main__":
	main()

Add a console application template