argparse.py

import math
import argparse

parser = argparse.ArgumentParser(description='Calculate volume of a Cylinder')
parser.add_argument('-r','--radius', type=int, metavar='', required=True, help='Radius of Cylinder')
parser.add_argument('-H','--height', type=int, metavar='', required=True, help='Height of Cylinder')
group = parser.add_mutually_exclusive_group()
group.add_argument('-q', '--quiet', action = 'store_true', help='print quiet')
group.add_argument('-v', '--verbose', action='store_true', help='print verbose')
args = parser.parse_args()

def cylinder_volume(radius,height):
    vol = (math.pi) * (radius ** 2) * (height)
    return vol

if __name__ == '__main__':
    volume = cylinder_volume(args.radius, args.height)
    if args.quiet:
        print (volume) 
    elif args.verbose:
        print ("Volume of a Cylinder with radius %s and height %s is %s" % (args.radius, args.height, volume))
    else:
        print("Volume of Cylinder = %s" %volume)