在python中确定按键的长度

Question

假设我想用python编写一个非常简单的程序来指示长按一个键。所以如果我键入并按住“j”键几分钟，我
我想写一个程序，能够显示像’的关键信息按下“j”键1.1秒。
据我所知，实现这一点的方法应该是通过检测为KEYDOWN事件和KEYUP事件添加时间戳，并使
时间戳的减法。所以检测KEYDOWN和keypup就足够了事件。有各种各样的问题和答案，所以关于检测一个单次按键或关于检测单字符输入，），两者都使用一些
格奇的形式。我已经查看了python诅咒库，并且尽我所能
密钥检测的主要形式也是以单个字符的形式获取（）。但它们不检测按键的长度，它们只检测按下键。我认识到检测按键的长度是一项必要的任务游戏，所以我希望pygame有检测按键持续时间的方法。但我希望有可能使用更苗条、更直接的方法库来检测按键持续时间。

Answer 1

You can use this code:

from pynput import keyboard 
import time

def on_key_release(key): #what to do on key-release
    time_taken = round(time.time() - t, 2) #rounding the long decimal float
    print("The key",key," is pressed for",time_taken,'seconds')
    return False #stop detecting more key-releases

def on_key_press(key): #what to do on key-press
    return False #stop detecting more key-presses

with keyboard.Listener(on_press = on_key_press) as press_listener: #setting code for listening key-press
    press_listener.join()

t = time.time() #reading time in sec

with keyboard.Listener(on_release = on_key_release) as release_listener: #setting code for listening key-release
    release_listener.join()

Using pygame: (Good)

import time
import pygame
import os
os.environ["SDL_VIDEO_CENTERED"] = "1"

screen = pygame.display.set_mode((600, 600))
pygame.display.set_caption("Time")
clock = pygame.time.Clock()

pygame.init()

clock = pygame.time.Clock()

running = True       
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
            pygame.quit()
            break
        if event.type == pygame.KEYDOWN:
            # detect key 'a'
            if event.key == pygame.K_a: # key 'a'
                t = time.time()
        if event.type == pygame.KEYUP:
            if event.key == pygame.K_a: # key 'a'
                t = time.time() - t; t = str(t); t = t[:5]
                print("You pressed key 'a' for",t,'seconds')


        screen.fill((255, 255, 255))
        pygame.display.update()

        clock.tick(40)

It will only detect the keys that you will write in the code.

Use pip install pynput to install pynput.
Use pip install pygame to install pygame.