Python Context Management

1 ImportQueue2 ImportContextlib3 Import Time4 @contextlib. ContextManager5 defworker_state (xxx,val):6 Xxx.append (val)7     Print("before", XXX)8     Try:9Time.sleep (1)Ten         yield One     finally: A Xxx.remove (val) -         Print(" After", XXX) -  the if __name__=='__main__': -Q =queue. Queue () -Q.put ("123") -Li = [] +With Worker_state (li,1): -Q.get ()

1 C:\Python35\python3.exe f:/python/taochen/day22/a15.py2 before [1]3 After [] 4 5 Process finished with exit code 0

Python Context Management