when I use“Xtime2 = extract_features(df131_new, column_id='name', column_sort='time')”，there is an error

[Lixiao1273]

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()
            ...

[nils-braun]

Hi!
Have you tried adding the if __name__ == '__main__': as mentioned in the error message? Does it still fail?

[Lixiao1273]

Thank you very much. What you said solved my problem. As I am a beginner, I made this mistake. Finally, thank you very much for solving my question.