【英文】Python3监测按键按下

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Preface

Detecting key press in Python3

Terminating the program when a key is pressed

Installing dependencies

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pip3 install pynput

Detecting the ESC key

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import threading
from pynput import keyboard

isEnd = False

# Function to execute when a key is pressed, using try and except because of special keys (function keys)
def keyboard_on_press(key):
    global isEnd
    try:
        print(f'Letter key {key.char} pressed')
    except AttributeError:
        print(f'Special key {key}')
        if key == keyboard.Key.esc:
            isEnd = True
            return False


# Interrupted program
def function():
    # Infinite loop of the main program
    while True:
        pass


def main():
    global isEnd
    # Create keyboard listening thread
    listener = keyboard.Listener(on_press=keyboard_on_press)
    listener.daemon = 1

    # Create main program thread
    t = threading.Thread(target=function)
    t.daemon = 1
    
    # Start keyboard listening thread
    listener.start()
    # Start main program thread
    t.start()
    
    while True:
        if isEnd:
            return


if __name__ == "__main__":
    main()

Executing the program when a key is pressed

Detecting the ESC key

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import keyboard


# Program to execute when a key is pressed
def function():
    pass


def main():
    keyboard.add_hotkey("esc", function)
    keyboard.wait()


if __name__ == "__main__":
    main()

Pitfalls

  • Error: OSError: Error 13 - Must be run as administrator

Solution

  • Run the program as an administrator

<filename>: Python file name

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sudo python3 <filename>.py

Completion

References

CSDN——广大菜鸟
CSDN——IT技术学习