在Python 2.7中立即停止線程執行/終止

Question

我正在設計一個基於QT的應用程序，它是用Python設計的。該應用程序具有以下兩個按鈕：

1. 移動機器人
2. 停止機器人

機器人需要一些時間來移動從一點到另一點。因此，我調用一個新的線程來控制機器人的運動，以防止GUI無響應。移動功能下方：

from threading import Thread 
from thread import start_new_thread 

def move_robot(self): 
    def move_robot_thread(points): 
     for point in points: 
      thread = Thread(target=self.robot.move, args=(point,)) 
      thread.start() 
      thread.join() 
    start_new_thread(move_robot_thread, (points,)) 

上述功能運行良好。爲了阻止機器人的運動，我需要停止執行上述線程。請參閱下面的完整代碼：

from python_qt_binding.QtGui import QPushButton 

self.move_robot_button = QPushButton('Move Robot') 
self.move_robot_button.clicked.connect(self.move_robot) 
self.move_robot_button = QPushButton('Stop Robot') 
self.move_robot_button.clicked.connect(self.stop_robot) 
self.robot = RobotControllerWrapper() 

from threading import Thread 
from thread import start_new_thread 

def move_robot(self): 
    def move_robot_thread(points): 
     for point in points: 
      thread = Thread(target=self.robot.move, args=(point,)) 
      thread.start() 
      thread.join() 
    start_new_thread(move_robot_thread, (points,)) 

def stop_robot(self): 
    pass 

class RobotControllerWrapper(): 
    def __init__(self): 
     self.robot_controller = RobotController() 

    def move(self, point): 
     while True: 
      self._robot_controller.move(point) 
      current_location = self.robot_controller.location() 
      if current_location - point < 0.0001: 
       break 

如何停止執行線程？有什麼建議嗎？

Answer 1

使用標誌應該足夠：

self.run_flag = False # init the flag 
... 

def move_robot(self): 
    def move_robot_thread(points): 
     self.run_flag = True # set to true before starting the thread 
     ... 

def stop_robot(self): 
    self.robot.stop() 

class RobotControllerWrapper(): 
    ... 
    def move(self, point): 
     while self.run_flag == True: # check the flag here, instead of 'while True' 
      ... 

    def stop(self): 
     self.run_flag = False # set to false to stop the thread