Python plugin user defined plant

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Hi, I am trying to implement a user-defined plant component controlled by Python. But I found there was a contradiction of the EMS calling manager. The component I defined must have at least one EMS calling manager pointed out in the object, but then how can I let the Python plug-in run? More briefly, who owns the priority here, Python plug-in or Erl EMS? How can I directly use Python to initialize and simulate the customized component?

Thanks for caring about my question!