python37-32_讨论 - 廖雪峰的官方网站

在windows下运行出现RuntimeError错误，有谁知道吗？

部分代码如下：

def return_task_queue():

global task_queue

return task_queue

def return_result_queue():

global result_queue

return result_queue

class QueueManager(BaseManager):

pass

# windows

QueueManager.register('get_task_queue', callable=return_task_queue)

QueueManager.register('get_result_queue', callable=return_result_queue)Traceback (most recent call last):

File "", line 1, in

File "G:toolPython37-32libmultiprocessingspawn.py", line 105, in spawn_main

exitcode = _main(fd)

File "G:toolPython37-32libmultiprocessingspawn.py", line 114, in _main

prepare(preparation_data)

File "G:toolPython37-32libmultiprocessingspawn.py", line 225, in prepare

_fixup_main_from_path(data['init_main_from_path'])

File "G:toolPython37-32libmultiprocessingspawn.py", line 277, in _fixup_main_from_path

run_name="__mp_main__")

File "G:toolPython37-32librunpy.py", line 263, in run_path

pkg_name=pkg_name, script_name=fname)

File "G:toolPython37-32librunpy.py", line 96, in _run_module_code

mod_name, mod_spec, pkg_name, script_name)

File "G:toolPython37-32librunpy.py", line 85, in _run_code

exec(code, run_globals)

File "G:workspacePycharmProjects2task_master.py", line 44, in

manager.start()

File "G:toolPython37-32libmultiprocessingmanagers.py", line 543, in start

self._process.start()

File "G:toolPython37-32libmultiprocessingprocess.py", line 112, in start

self._popen = self._Popen(self)

File "G:toolPython37-32libmultiprocessingcontext.py", line 322, in _Popen

return Popen(process_obj)

File "G:toolPython37-32libmultiprocessingpopen_spawn_win32.py", line 33, in __init__

prep_data = spawn.get_preparation_data(process_obj._name)

File "G:toolPython37-32libmultiprocessingspawn.py", line 143, in get_preparation_data

_check_not_importing_main()

File "G:toolPython37-32libmultiprocessingspawn.py", line 136, in _check_not_importing_main

is not going to be frozen to produce an executable.''')

RuntimeError:

An attempt has been made to start a new process before the

current process has finished its bootstrapping phase.

This probably means that you are not using fork to start your

child processes and you have forgotten to use the proper idiom

in the main module:

if __name__ == '__main__':

freeze_support()

...

The "freeze_support()" line can be omitted if the program

is not going to be frozen to produce an executable.