KITFORMA · EDITORIAL ANSWER
Why does multiprocessing repeatedly start my script on Windows?
KitForma editorial guide. Spawn-based process creation imports the main module in each child. Unguarded top-level process creation therefore runs again during import.
Step-by-step answer
Spawn-based process creation imports the main module in each child. Unguarded top-level process creation therefore runs again during import.
Put process startup under
if __name__ == "__main__": and define worker functions at importable module scope. Keep import-time code free of jobs, network calls and UI side effects. Test the script from a clean terminal rather than relying only on an interactive notebook. Objects sent to workers must be serializable for the selected start method. The main guard fixes recursive startup; it does not solve oversized payloads, missing shutdown or unsafe shared database connections.Sources and verification
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