Я пытаюсь поэкспериментировать с многопроцессорностью в python. Я изначально написал этот тестовый код в системе Ubuntu, и он отлично работает. Когда я пытаюсь запустить то же самое в windows, я получаю следующую ошибку:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 116, in spawn_main
exitcode = _main(fd, parent_sentinel)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 125, in _main
prepare(preparation_data)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 236, in prepare
_fixup_main_from_path(data['init_main_from_path'])
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 287, in _fixup_main_from_path
main_content = runpy.run_path(main_path,
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 263, in run_path
return _run_module_code(code, init_globals, run_name,
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 96, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 86, in _run_code
exec(code, run_globals)
File "C:\Users\Peri\Documents\Heatloss Project\OGI_u_value_module-master\test.py", line 21, in <module>
main()
File "C:\Users\Peri\Documents\Heatloss Project\OGI_u_value_module-master\test.py", line 15, in main
p1.start()
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\process.py", line 121, in start
self._popen = self._Popen(self)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\context.py", line 326, in _Popen
return Popen(process_obj)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\popen_spawn_win32.py", line 45, in __init__
prep_data = spawn.get_preparation_data(process_obj._name)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 154, in get_preparation_data
_check_not_importing_main()
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 134, in _check_not_importing_main
raise RuntimeError('''
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.
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 116, in spawn_main
exitcode = _main(fd, parent_sentinel)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 125, in _main
prepare(preparation_data)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 236, in prepare
_fixup_main_from_path(data['init_main_from_path'])
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 287, in _fixup_main_from_path
main_content = runpy.run_path(main_path,
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 263, in run_path
return _run_module_code(code, init_globals, run_name,
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 96, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 86, in _run_code
exec(code, run_globals)
File "C:\Users\Peri\Documents\Heatloss Project\OGI_u_value_module-master\test.py", line 21, in <module>
main()
File "C:\Users\Peri\Documents\Heatloss Project\OGI_u_value_module-master\test.py", line 15, in main
p1.start()
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\process.py", line 121, in start
self._popen = self._Popen(self)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\context.py", line 326, in _Popen
return Popen(process_obj)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\popen_spawn_win32.py", line 45, in __init__
prep_data = spawn.get_preparation_data(process_obj._name)
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 154, in get_preparation_data
_check_not_importing_main()
File "C:\Users\Peri\AppData\Local\Programs\Python\Python38-32\lib\multiprocessing\spawn.py", line 134, in _check_not_importing_main
raise RuntimeError('''
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.
Код очень базовый c, всего два процесса: печать текста и выход из
from multiprocessing import Process
def process1(text):
return print(text)
def process2(text):
return print(text)
def main():
p1 = Process(target=process1, args=('Test1', ))
p2 = Process(target=process2, args=('Test2', ))
p1.start()
p2.start()
p1.join()
p2.join()
main()
Я не могу понять, что происходит в Windows?