如何從 pynput.keyboard.Listener 線程獲取返回值？

Question

我想在 pynput.keyboard.Listener 中獲取pynput.keyboard.Listener的返回值。 我認為它唯一可行的就是使用全局變量。 也是ThreadPool ，但我認為它不會在這個來自 pynput 的預定義 threading.thread 中工作，稱為 keyboard.Listener()

示例代碼

message = ' '
keys = []

def write_keys(keys):
    global message
    for key in keys:
        k = str(key).replace(f'{chr(39)}', '')
        print(k)
        message += k
    if len(message) == 10:
        return message # return this value

def on_press(key):
    global keys
    keys.append(key)
    write_keys(keys)
    keys = []

keyboard_thread = keyboard.Listener(on_press=on_press)
keyboard_thread.start()
#messages = return the message value

Answer 1

如果你想避免使用global變量。你可以使用 ThreadQueue。

from pynput import keyboard
from queue import Queue

message = ''
keys = []

queue = Queue()

def write_keys(keys):
    global message
    for key in keys:
        k = str(key).replace(f'{chr(39)}', '')
        print(k)
        message += k
    if len(message) == 10:
        queue.put(message)

def on_press(key):
    global keys
    keys.append(key)
    write_keys(keys)
    keys = []

keyboard_thread = keyboard.Listener(on_press=on_press)
keyboard_thread.start()
while True:
    messages = queue.get()
    print(messages)