python中的多处理跳转过程没有错误
我有下面的代码,它的行为非常奇怪python中的多处理跳转过程没有错误,python,python-multiprocessing,Python,Python Multiprocessing,我有下面的代码,它的行为非常奇怪 class A: def __init__(self): self.lock = Lock() self.process_list = [] self.event_list = [] def run(self): self.process_list = [] counter = 0 n = 0 while (n<1000):
class A:
def __init__(self):
self.lock = Lock()
self.process_list = []
self.event_list = []
def run(self):
self.process_list = []
counter = 0
n = 0
while (n<1000):
n += 1
print("in while again")
self.lock.acquire()
print('after acquired lock')
self.lock.release()
self.event_list.append(Event())
print('add event')
p = Process(target=workerEmulator().run,
args=(self.lock, self.event_list[counter]))
print('create process')
self.process_list.append(p)
print('add process')
self.event_list[counter].clear()
counter += 1
print("about to start process")
print("n="+str(n))
p.start()
print("new process started")
print(": main process, active_children: " + str(multiprocessing.active_children()))
del_list = [] # the list for storing index of the process/event to delete
for i in range(len(self.event_list)):
if (self.event_list[i].is_set()):
self.process_list[i].join()
print("one process finished, its exit code: " + str(self.process_list[i].exitcode))
print("this process is alived or not? " + str(self.process_list[i].is_alive()))
del_list.append(i)
del_list.sort(reverse=True)
for i in del_list:
del self.event_list[i]
del self.process_list[i]
counter -= 1
time.sleep(0.1)
for p in self.process_list:
p.join()
print("one process finished, its exit code: " + str(p.exitcode))
print("this process is alived or not? " + str(p.is_alive()))
class workerEmulator:
def __init__(self):
pass
def run(self, lock, event):
print("a new process")
self.lock = lock
self.event = event
time.sleep(20)
print("after sleep")
self.lock.acquire()
print("in lock")
self.lock.release()
self.event.set()
if __name__ == '__main__':
a = A()
a.run()
A类:
定义初始化(自):
self.lock=lock()
self.process_list=[]
self.event_list=[]
def运行(自):
self.process_list=[]
计数器=0
n=0
而(n请参见Matt的评论,问题是由于子输出与父输出混合造成的。千分之多少缺失(您计算的最小值和最大值),一致性如何?每次运行的数字总是相同的,还是随机的?由于您不依赖任何类型的锁定来保留打印输出,您是否确认文本没有从另一个进程的输出中分割,例如“新8 Pro0ces0”?通常少于10次,从2到8次,因为我正在测试它,但它肯定会丢失一些。锁定打印是一个很好的建议,让我尝试禁用子进程的输出@MattJordan@MattJordan是的,您是对的,禁用子输出后,问题就解决了!谢谢!