Argparse Example

argparse_demo.py

''' Python - Argparse '''
# Calculate the Area of Circle

import math
import argparse


# 1. Without Argparse -----------------------------------------------------------
# def circle_area(radius):
#     return math.pi * (radius ** 2)
# 
# if __name__ == "__main__":
#     print(circle_area(3))
'''
Execution Command
$ python argparse_demo.py
'''


# 2. Argparse - Basic -----------------------------------------------------------
# parser = argparse.ArgumentParser(description="Calculate the Area of Circle")
# parser.add_argument("-r", "--radius", type=int, help="Radius of Circle")
# args = parser.parse_args()
# 
# def circle_area(radius):
#     return math.pi * (radius ** 2)
# 
# if __name__ == "__main__":
#     print(circle_area(args.radius))

'''
Execution Command
$ python argparse_demo.py -r 7
'''


# 3. Argparse - Advanced --------------------------------------------------------
parser = argparse.ArgumentParser(description="Calculate the Area of Circle")
parser.add_argument("-r", "--radius", type=int, metavar="", required=True, help="Radius of Circle")

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 circle_area(radius):
    return math.pi * (radius ** 2)

if __name__ == "__main__":
    area = circle_area(args.radius)
    if args.quiet:
        print(area)
    elif args.verbose:
        print("The area of the circle is %s" % area)
    else:
        print("The area = %s" % area)

'''
Execution Command
$ python argparse_demo.py -v -r 7
'''