旨在在函数达到某个值时中断函数的 Elif 条件不起作用

Question

我一直在开发一个程序，检测按下“enter”的次数，问题是当变量达到某个值时，应该中断函数的 elif/if 条件会不断计算多次按下“enter”而不是破坏该功能。

from pynput import keyboard

keystroke = 0

def on_release(key):
    print(key)
    global keystroke
    if key == keyboard.Key.enter:
        keystroke += 1 #this sums to the variable keystroke +1.
        print(keystroke)
    elif keystroke > 3: #This intends to break the fuction when keystroke reaches or surpasses 3.
        return False

with keyboard.Listener( #Calling the function here.
        on_press=on_press,
        on_release=on_release) as listener:
    listener.join()

......

这是输出。

Output 

key.enter
1
key.enter
2
key.enter
3
key.enter
4
....

Answer 1

仅当由于 elif 而按下 Enter 以外的键时，当前程序才会检查击键次数。

相反，您应该用单独的 if 语句替换 elif。
另外，如果您希望该函数在击键次数达到 3 时中断，请将 大于 替换为 大于等号 ：

from pynput import keyboard

keystroke = 0

def on_release(key):
    print(key)
    global keystroke
    if key == keyboard.Key.enter:
        keystroke += 1 #this sums to the variable keystroke +1.
        print(keystroke)
    if keystroke >= 3: #This intends to break the fuction when keystroke reaches or surpasses 3.
        return False

with keyboard.Listener( #Calling the function here.
        on_press=on_press,
        on_release=on_release) as listener:
    listener.join()