[FIXED] How to display the final returned value from a Python program in terminal?

Issue

I'm simply writing a Python program that takes in 2 integers and returns the sum. The problem I encounter is that the terminal never displays the returned value, so I have to resort to making a print statement. Is there any way to have the terminal display the returned value of the program?

The code is as follows:

import argparse

def simple_addition():
    parser = argparse.ArgumentParser(description = "Simple Addition Program to Test CLI")

    # each line add AN argument to our terminal inout
    parser.add_argument("first_number", type = int, help = "enter the first integer")
    parser.add_argument("second_number", type = int, help = "enter the second integer")
    args = parser.parse_args()

    # storing the entered argument internally within our code for ease of access
    first = args.first_number
    second = args.second_number

    # calculate and return the sum
    sum = first + second
    print("A PRINT CALL (not return): ", sum)
    return sum

simple_addition()

Following is a screenshot of the terminal when I run this program.

Solution

#! /usr/bin/env python3

import argparse

def simple_addition():
    parser = argparse.ArgumentParser(description = "Simple Addition Program to Test CLI")

    # each line add AN argument to our terminal inout
    parser.add_argument("first_number", type = int, help = "enter the first integer")
    parser.add_argument("second_number", type = int, help = "enter the second integer")
    args = parser.parse_args()

    # storing the entered argument internally within our code for ease of access
    first = args.first_number
    second = args.second_number

    # calculate and return the sum
    sum = first + second
    #print("A PRINT CALL (not return): ", sum)
    return sum

if __name__ == '__main__':
    print(simple_addition())

1. add shebang on first line and chmod +x
2. do not print inside the function
3. do it only if it's main (so you can import the module if needed)

then you can invoke it directly

./"CLI Testing.py" 35 45

Answered By - Diego Torres Milano