Write custom python wrapper

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Hi,

I have a python module with custom functionalities, that receives and sends data from ROS as a node. Now I would like to make this module ROS-agnostic. Therefore I write a new ROS-node with publishers and subscribers that receive and send the data from the python module. I have to connect the new node with the ROS-agnostic python module. How can I pass the data from/to the running node to/from the python module in a specified frequency?

Thanks