[已解决]lock

莫待无花空折枝

1. import threading
   
2. import random
   
3. import time
   
4. 
   
5. lock = threading.Lock
   
6. list1 = [0]*10
   
7. def task1():
   
8.     lock.acquire()
   
9.     for i in range(len(list1)):
   
10.         list1[i] = 1
    
11.         sleep(0.1)
    
12. 
    
13.     lock.release()
    
14. 
    
15. def task2():
    
16.     lock.acquire()
    
17.     for i in range(len(list1)):
    
18.         print('------',i)
    
19.         sleep(0.1)
    
20.     lock.release()
    
21. 
    
22. if __name__ == '__main__':
    
23.     th1 = threading.Thread(target=task1)
    
24.     th2 = threading.Thread(target=task2)
    
25. 
    
26.     th1.start()
    
27.     th2.start()
    
28. 
    
29.     th1.join()
    
30.     th2.join()
    
31. 
    
32.     print(list1)

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结果

1. File "D:\python3.7\Lib\threading.py", line 865, in run
   
2.     self._target(*self._args, **self._kwargs)
   
3.   File "E:/python_pycharm/进阶学习/threading03.py", line 16, in task2
   
4.     lock.acquire()
   
5. AttributeError: 'builtin_function_or_method' object has no attribute 'acquire'
   
6. [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
   

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但我看是有这个方法的呀

1. class Lock:
   
2.     def __init__(self) -> None: ...
   
3.     def __enter__(self) -> bool: ...
   
4.     def __exit__(self, exc_type: Optional[Type[BaseException]],
   
5.                  exc_val: Optional[BaseException],
   
6.                  exc_tb: Optional[TracebackType]) -> Optional[bool]: ...
   
7.     if sys.version_info >= (3,):
   
8.         def acquire(self, blocking: bool = ..., timeout: float = ...) -> bool: ...
   
9.     else:
   
10.         def acquire(self, blocking: bool = ...) -> bool: ...
    
11.     def release(self) -> None: ...
    
12.     def locked(self) -> bool: ...

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为什么不能用

最佳答案

月排行榜 / 总排行榜

Twilight6

2020-6-11 11:18:07

两个错误，第一个：

1. lock = threading.Lock

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改成：

1. lock = threading.Lock()

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第二个 time模块：

1. import time

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改成：

1. from time import sleep

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完整代码：

1. import threading
   
2. import random
   
3. from time import sleep
   
4. 
   
5. lock = threading.Lock()
   
6. list1 = [0]*10
   
7. def task1():
   
8.     lock.acquire()
   
9.     for i in range(len(list1)):
   
10.         list1[i] = 1
    
11.         sleep(0.1)
    
12. 
    
13.     lock.release()
    
14. 
    
15. def task2():
    
16.     lock.acquire()
    
17.     for i in range(len(list1)):
    
18.         print('------',i)
    
19.         sleep(0.1)
    
20.     lock.release()
    
21. 
    
22. if __name__ == '__main__':
    
23.     th1 = threading.Thread(target=task1)
    
24.     th2 = threading.Thread(target=task2)
    
25. 
    
26.     th1.start()
    
27.     th2.start()
    
28. 
    
29.     th1.join()
    
30.     th2.join()
    
31. 
    
32.     print(list1)

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跳转到最佳答案楼层

Twilight6

两个错误，第一个：

1. lock = threading.Lock

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改成：

1. lock = threading.Lock()

复制代码

第二个 time模块：

1. import time

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改成：

1. from time import sleep

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完整代码：

1. import threading
   
2. import random
   
3. from time import sleep
   
4. 
   
5. lock = threading.Lock()
   
6. list1 = [0]*10
   
7. def task1():
   
8.     lock.acquire()
   
9.     for i in range(len(list1)):
   
10.         list1[i] = 1
    
11.         sleep(0.1)
    
12. 
    
13.     lock.release()
    
14. 
    
15. def task2():
    
16.     lock.acquire()
    
17.     for i in range(len(list1)):
    
18.         print('------',i)
    
19.         sleep(0.1)
    
20.     lock.release()
    
21. 
    
22. if __name__ == '__main__':
    
23.     th1 = threading.Thread(target=task1)
    
24.     th2 = threading.Thread(target=task2)
    
25. 
    
26.     th1.start()
    
27.     th2.start()
    
28. 
    
29.     th1.join()
    
30.     th2.join()
    
31. 
    
32.     print(list1)

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