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Whenever elpy-mode is activated upon visiting a python file, I see a py.exe executable start, with a subtree of processes. This should be the remote procedure call (thanks @al0 for the explanation). It's what Elpy uses to check syntax, documentation, etc. Just to be clear I'm not speaking of the Python interpreter, started with run-python.

After I kill the buffer with the python code and elpy-mode, I see that the spanned RPC process and its tree are still alive. This happens even if I don't have any buffers, open or buried, with elpy-mode.

I don't quite see the point of the RPC remaining alive. Is this by design? Is there a command or function to kill it? At the moment I must open the task manager to kill it.

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    Presumably this is the rpc. I only see restart, not kill in the docs. Is it just alive or actually running?
    – al0
    Commented Apr 12, 2020 at 20:01
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    Indeed it is, I'll edit my question to mention this. From what I see it is only alive; but it does use RAM, which in some cases would be precious to have available for something else.
    – pglpm
    Commented Apr 12, 2020 at 22:58
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    @al0 Thank you for the implicit suggestion. The command elpy-rpc-restart kills the rpc, and it restarts it – but only if the elpy buffer still exists. So a solution is to first kill the buffer and then call M-x elpy-rpc-restart. Maybe this can be automated in some hook. Please feel free to write your suggestion as a solution.
    – pglpm
    Commented Apr 12, 2020 at 23:08
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    It would be normal for there to be a buffer (perhaps hidden) associated with the process. Have a look at M-x list-processes
    – phils
    Commented Apr 12, 2020 at 23:21
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    @phils You're right. There's an invisible buffer called elpy-rpc. Killing that buffer also kills the process. Thank you very much.
    – pglpm
    Commented Apr 13, 2020 at 8:06

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