I try to run this example code on Pycharm2018.3.3, it didn't work out. But the same code can run on the IDLE without any error.
My environment is Python3.7 + windows10.
from multiprocessing import Process, Queue
def f(q):
q.put([42, None, 'hello'])
if __name__ == '__main__':
q = Queue()
p = Process(target=f, args=(q,))
p.start()
print(q.get()) # prints "[42, None, 'hello']"
p.join()
Process Process-1:
Traceback (most recent call last):
File "C:\Users\WYM\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\process.py", line 297, in _bootstrap
self.run()
File "C:\Users\WYM\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\process.py", line 99, in run
self._target(*self._args, **self._kwargs)
File "E:\Spider2\ControlNode\test.py", line 4, in f
q.put([42, None, 'hello'])
File "C:\Users\WYM\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\queues.py", line 82, in put
if not self._sem.acquire(block, timeout):
PermissionError: [WinError 5] Access is denied.