如何在终端中显示 Python 程序的最终返回值？

Question

我只是在编写一个 Python 程序，它接受 2 个整数和 returns 总和。我遇到的问题是终端从不显示返回值，所以我不得不求助于打印语句。有什么办法可以让终端显示程序的返回值吗？

代码如下：

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()

下面是我运行这个程序时的终端截图

Answer 1

Is there any way to have the terminal display the returned value of the program?

是的，通过使用 print。这就是它的用途。

so I have to resort to making a print statement

您不会像不“求助”+ 运算符以将两个数字相加那样“求助”它。这就是它的用途。

但是，打印和从函数返回结果确实不是好的设计（例如，它会阻止您在不这样做的情况下重用该函数）我不想打印结果）。

与其在函数内部打印结果，不如在调用代码中打印返回值：

print(simple_addition())

或

result = simple_addition()
print(result)

Answer 2

#! /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())

在第一行添加 shebang chmod +x
不要在函数内部打印
只有当它是主要的时候才这样做（这样你就可以在需要时导入模块）

然后就可以直接调用了

./"CLI Testing.py" 35 45

如何在终端中显示 Python 程序的最终返回值？

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

python

terminal

return