Python: 更改线程中的 class 成员

Question

我目前正在尝试通过单独的线程更改 class 的成员变量。我想从主进程访问更改的变量，但似乎总是创建一个副本，主线程不再可见。你有什么想法吗？非常感谢您的帮助。示例代码：

class foo():
 def __init__(self):
     self.data = 0

 def test_f(self):
     for it in range(0,3):
         self.data = self.data + 1
         time.sleep(1.0)
     print('thread terminated')
     print(self.data)

#This function is outside the class; Unfortunately, indentations do not work properly here right now

def run(m_foo):
 for it in range(0,10):
     m_foo.test_f(q)
     time.sleep(1.0)

if __name__ == '__main__':
 m_foo = foo()
 p = Process(target=run, args=(m_foo))
 p.start()     
stop_char = ""
while stop_char.lower() != "q":
    stop_char = input("Enter 'q' to quit\n")        
    print("Process data:")
    print(foo.data)
if p.is_alive():
   p.terminate()

Output: Process data: 0 .... thread terminated 21 thread terminated 24 thread terminated 27 thread terminated 30 ... Process data: 0

Answer 1

class multiprocessing.Process 没有创建线程。它使用自己的内存创建一个全新的处理 space.

改用threading.Thread：
https://docs.python.org/3/library/threading.html#threading.Thread

Python: 更改线程中的 class 成员

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