[已解决]pycharm多进程代码没错但解释器报错问题求解

ftwegc

# 1. 导入进程包
import multiprocessing
import time


# 跳舞任务
def dance():
    for i in range(3):
        print("跳舞中...")
        time.sleep(0.2)


# 唱歌任务
def sing():
    for i in range(3):
        print("唱歌中...")
        time.sleep(0.2)



dance_process = multiprocessing.Process(target=dance)
sing_process = multiprocessing.Process(target=sing)

# 3. 启动进程执行对应的任务
dance_process.start()
sing_process.start()

报错信息：C:\Users\wzb\AppData\Local\Programs\Python\Python38\python.exe C:/Users/wzb/PycharmProjects/pythonProject1/1.py
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 125, in _main
    prepare(preparation_data)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 236, in prepare
    _fixup_main_from_path(data['init_main_from_path'])
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 287, in _fixup_main_from_path
    main_content = runpy.run_path(main_path,
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 265, in run_path
    return _run_module_code(code, init_globals, run_name,
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 97, in _run_module_code
    _run_code(code, mod_globals, init_globals,
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\wzb\PycharmProjects\pythonProject1\1.py", line 28, in <module>
    dance_process.start()
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\process.py", line 121, in start
    self._popen = self._Popen(self)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\context.py", line 224, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\context.py", line 327, in _Popen
    return Popen(process_obj)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\popen_spawn_win32.py", line 45, in __init__
    prep_data = spawn.get_preparation_data(process_obj._name)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 154, in get_preparation_data
    _check_not_importing_main()
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\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\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 125, in _main
    prepare(preparation_data)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 236, in prepare
    _fixup_main_from_path(data['init_main_from_path'])
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 287, in _fixup_main_from_path
    main_content = runpy.run_path(main_path,
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 265, in run_path
    return _run_module_code(code, init_globals, run_name,
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 97, in _run_module_code
    _run_code(code, mod_globals, init_globals,
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\wzb\PycharmProjects\pythonProject1\1.py", line 28, in <module>
    dance_process.start()
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\process.py", line 121, in start
    self._popen = self._Popen(self)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\context.py", line 224, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\context.py", line 327, in _Popen
    return Popen(process_obj)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\popen_spawn_win32.py", line 45, in __init__
    prep_data = spawn.get_preparation_data(process_obj._name)
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 154, in get_preparation_data
    _check_not_importing_main()
  File "C:\Users\wzb\AppData\Local\Programs\Python\Python38\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.



我用py3.8和py3.9都试了试，都不行，解释器也没报错，pycharm重装了好几遍，都不行 求帮助

最佳答案

月排行榜 / 总排行榜

rsj0315

2021-7-8 13:14:35

# 1. 导入进程包
import multiprocessing
import time


# 跳舞任务
def dance():
    for i in range(3):
        print("跳舞中...")
        time.sleep(0.2)


# 唱歌任务
def sing():
    for i in range(3):
        print("唱歌中...")
        time.sleep(0.2)



dance_process = multiprocessing.Process(target=dance)
sing_process = multiprocessing.Process(target=sing)
if __name__ == '__main__':

    # 3. 启动进程执行对应的任务
    dance_process.start()
    sing_process.start()

试试这个

跳转到最佳答案楼层

rsj0315

# 1. 导入进程包
import multiprocessing
import time


# 跳舞任务
def dance():
    for i in range(3):
        print("跳舞中...")
        time.sleep(0.2)


# 唱歌任务
def sing():
    for i in range(3):
        print("唱歌中...")
        time.sleep(0.2)



dance_process = multiprocessing.Process(target=dance)
sing_process = multiprocessing.Process(target=sing)
if __name__ == '__main__':

    # 3. 启动进程执行对应的任务
    dance_process.start()
    sing_process.start()

试试这个

西瓜味的苹果

向日葵号发来，我给你看

ftwegc

rsj0315 发表于 2021-7-8 13:37
试试这个

老哥厉害啊