Python在多进程线程中使用全局变量

huangapple
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英文:

Python use global variable inside a multiprocessing thread

问题

  1. 我试图在两个不同的多进程线程中的两个函数内使用一个变量，但似乎该变量无法共享...
  3. ```python
  4. import multiprocessing
  6. threads = []
  7. counter = 0
  9. def my_function():
  10.     global counter
  11.     while True:
  12.         counter += 1
  14. def my_function_two():
  15.     global counter
  16.     while True:
  17.         print(counter)
  20. threads.append(multiprocessing.Process(target=my_function))
  21. threads.append(multiprocessing.Process(target=my_function_two))
  23. for j in threads:
  24.     j.start()
  26. for j in threads:
  27.     j.join()

我看到了关于在线程中共享全局变量的不同问题，但它们都没有帮助。

提前感谢

  2. <details>
  3. <summary>英文:</summary>
  5. I&#39;m trying to use a variable inside two functions in two different multiprocessing threads, but it seems that the variable can&#39;t be shared...

import multiprocessing

threads = []
counter = 0

def my_function():
global counter
while True:
counter += 1

def my_function_two():
global counter
while True:
print(counter)

threads.append(multiprocessing.Process(target=my_function))
threads.append(multiprocessing.Process(target=my_function_two))

for j in threads:
j.start()

for j in threads:
j.join()

  1. I saw different questions about sharing global variables in threads but none of them are helpful.
  3. Thanks in advance
  5. </details>
  8. # 答案1
  9. **得分**: 0
  11. 这是我的代码
  13. ```python
  14. import threading
  16. threads = []
  17. counter = 0
  19. def my_function():
  20.     global counter
  21.     while True:
  22.         counter += 1
  24. def my_function_two():
  25.     global counter
  26.     while True:
  27.         print(counter)
  29. threads.append(threading.Thread(target=my_function))
  30. threads.append(threading.Thread(target=my_function_two))
  32. for j in threads:
  33.     j.start()
  35. for j in threads:
  36.     j.join()
英文:

This is my code

  1. import threading
  3. threads = []
  4. counter = 0
  6. def my_function():
  7.     global counter
  8.     while True:
  9.         counter += 1
  11. def my_function_two():
  12.     global counter
  13.     while True:
  14.         print(counter)
  17. threads.append(threading.Thread(target=my_function))
  18. threads.append(threading.Thread(target=my_function_two))
  20. for j in threads:
  21.     j.start()
  23. for j in threads:
  24.     j.join()

huangapple
  • 本文由 发表于 2023年7月20日 15:51:06
  • 转载请务必保留本文链接：https://go.coder-hub.com/76727737.html
  • multithreading
  • python
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