Read Command Line arguments using arg parse in Python

read_arguments.py

#! /usr/bin/python
import argparse

parser = argparse.ArgumentParser(description="This is a test.")
parser.add_argument("-e", "--echo",
    help="echo the string you use here", required = True)
parser.add_argument("-u", "--uppercase",
    help="Echo data to uppercase", action="store_true")
parser.add_argument("-v", "--version", action='version', version='%(prog)s 1.0')    
args = parser.parse_args()

print "args.uppercase=%s" % args.uppercase

if args.uppercase:
    print args.echo.upper()
else :
    print args.echo

usage.txt

usage: read_arguments.py [-h] -e ECHO [-u] [--version]
 
This is a test.
 
optional arguments:
  -h, --help            show this help message and exit
  -e ECHO, --echo ECHO  echo the string you use here
  -u, --uppercase       Echo data to uppercase
  -v, --version         show program's version number and exit