How to write a loop that can be terminated at any time in python?

Preface

You can use thekeyboard library to listen for keyboard input and terminate the loop when a specified key is pressed. Here's a sample code that does what you describe:

import keyboard
import time

def print_loop():
    while True:
        print("1")
        time.sleep(3)
        print("2")
        time.sleep(3)

        # 检查是否有键盘输入
        if keyboard.is_pressed('0') or keyboard.is_pressed('down'):
            print("循环终止")
            break

print_loop()

In this code, we use thekeyboard.is_pressed() function to check whether a key on the keyboard is pressed. If the numeric key "0" or the direction key "↓" is pressed, a message is printed and the break statement is used to jump out of the loop, thereby terminating the execution of the loop.

You need to make sure thekeyboard library is installed before running the code. You can install it using the following command:

pip install keyboard

Please note that this code can only be run in the terminal and not in some integrated development environments (such as Jupyter Notebook) because the keyboard listening function may not work properly.

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