[Python] Create a common CLI entry point in Python

First of all, I cannot share the original code so I apologize in advance if the example used does not make sense. I also know the code I present has some issues and will not run as it is, but it is just to represent an example.

I have created a package with multiple classes. Let's say Circle(radius: float) and, Rectangle(side_1: float, side_2: float). And for each one of them, I've created a command line interface entry point, each one corresponding to their correct parameters:

import argparse

def cli_circle():
parser = argparse.ArgumentParser()
parser.add_argument("radius")
args = parser.parse_args()

Circle(args.radius).calculate_area()

def cli_rect():
parser = argparse.ArgumentParser()
parser.add_argument("side_1")
parser.add_argument("side_2", required=False)
args = parser.parse_args()

if args.side_2 is None:
Rectangle(args.side_1, args.side_1).calculate_area()
else:
Rectangle(args.side_1, args.side_2).calculate_area()


I was wondering if it is possible to create a different and common entry point for all the classes. However, I am trying to avoid creating just one class with all the different parameters. My ideal solution would be a function that can call the other two functions, something as following:

def common_cli():
parser = argparse.ArgumetParser()
parser.add_argument("--rectangle", help="Runs the Rectangle class")
parser.add_argument("--circle", help="Runs the Circle class")
...
args = parser.parse_args()
if args.rectangle:
cli_rect(args)
elif args.circle:
cli_circle(args)
else:
raise ValueError("No class was selected.")


Is something like this already existing in Python? Or is my only solution to hardcode this?

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