[Python] Client to Server Remote Function Calls in Python. How to implement?

I'm trying to set up a simple client to server interface for calling functions/programs on the server. A client will send a simple command to the server listening for such commands. Once the server receives a command from the client it will execute the following function or program on the server. I have looked into a simple TCP server receiving a text string and parsing that string then executing the a function or external program. I have read into using XML-RPC implemented with a twisted server as well.

What I'm asking is which would be the easiest to set up or are there any other ways to easily do this task?

Thanks.

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