Python argparse command line flags without arguments

Question

How do I add an optional flag to my command line args?

eg. so I can write

python myprog.py 

or

python myprog.py -w         


        

Answer 1

Adding a quick snippet to have it ready to execute:

Source: myparser.py

import argparse
parser = argparse.ArgumentParser(description="Flip a switch by setting a flag")
parser.add_argument('-w', action='store_true')

args = parser.parse_args()
print args.w

Usage:

python myparser.py -w
>> True