解决 发生异常: RuntimeError (note: full exception trace is shown but execution is paused at: <module>)

发生异常: RuntimeError       (note: full exception trace is shown but execution is paused at: <module>)

        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.

如在python中使用多线程遇到上述错误，则需将执行代码套在main函数中即可解决：

if __name__ == '__main__':
    freeze_support()

不要直接裸放在python脚本中