按下键时记录（获取）鼠标单击位置，并在 python 中释放相同的键时停止记录答案

【问题标题】：Record (get) mouse click position while key is pressed and stop recording when same key is released in python按下键时记录（获取）鼠标单击位置，并在 python 中释放相同的键时停止记录
【发布时间】：2018-08-06 10:37:31
【问题描述】：

我正在创建一个脚本，如果用户按下 f7，它将开始记录鼠标点击，当他释放按钮时它应该停止，除非用户关闭程序，否则会发生这种情况。

尽管按下 f7，脚本仍打印“无”，而不是显示点击位置和“f7”，而是显示无。

在 on_press 函数中打印值时显示“f7”，但在 on_click 函数中单击鼠标按钮时显示“None”

这里是代码

from pynput import mouse, keyboard
from pynput.keyboard import Key, Listener
import pickle

x_pos = []
y_pos = []
both_pos = []

pressed_key = None

def on_press(key):
    if (key==keyboard.Key.f7):
        pressed_key = "f7"
    else:
        pressed_key = None

def on_release(key):
    pass

def on_click(x, y, button, pressed):
    if pressed:
        #print ("{0} {1}".format(x,y))
        print(pressed_key)
        if pressed_key == "f7":
            x_pos.append("{0}".format(x,y))
            y_pos.append("{1}".format(x,y))
            #print("test" + x_pos + y_pos)
            print (x_pos + y_pos)
        #both_pos = x_pos, y_pos
        else:
            pass
        print (x_pos + y_pos)


mouse_listener = mouse.Listener(on_click=on_click)
mouse_listener.start()

with keyboard.Listener(on_press = on_press, on_release = on_release) as listener:
    try:
        #listener.start()
        listener.join()
    except MyException as e:
        print('Done'.format(e.args[0]))

【问题讨论】：

标签： python python-3.x winapi pywin32 pyhook

【解决方案1】：

发现问题。因为在 on_press 我没有使用 global press_key 所以它正在创建局部变量。

这是工作代码。

from pynput import mouse, keyboard
from pynput.keyboard import Key, Listener
import pickle

x_pos = []
y_pos = []
both_pos = []

pressed_key  = None

def on_press(key):
    global pressed_key
    if (key==keyboard.Key.f7):
        pressed_key = "f7"
        print(pressed_key)
    else:
        pressed_key = None

def on_release(key):
    global pressed_key
    pressed_key = None

def on_click(x, y, button, pressed):
    if pressed:
        #print ("{0} {1}".format(x,y))
        print(pressed_key)
        if pressed_key == "f7":
            x_pos.append("{0}".format(x,y))
            y_pos.append("{1}".format(x,y))
            #print("test" + x_pos + y_pos)
            print (x_pos + y_pos)
        #both_pos = x_pos, y_pos
        else:
            pass
        print (x_pos + y_pos)


mouse_listener = mouse.Listener(on_click=on_click)
mouse_listener.start()

with keyboard.Listener(on_press = on_press, on_release = on_release) as listener:
    try:
        #listener.start()
        listener.join()
    except MyException as e:
        print('Done'.format(e.args[0]))

【讨论】：