[fpc-pascal] Code to send message from Python script to FPC's TSimpleIPCServer

[Michalis Kamburelis]

Just sharing, in case someone will find the below information useful,
or worthy to add to some wiki or docs anywhere:

I have here a daemon written in FPC that communicates with clients by
very nice TSimpleIPCServer class (in SimpleIPC unit). Of course it's
trivial to send a message to such server from another FPC program (see
fcl-base/examples/ipcclient.pp). Turns out it's also trivial to send
a message from a Python program. Attaching the Python code. You can
probably easily add alternatives for any other programming language to
this :)

Note that this is specific to Unix, where SimpleIPC just uses a named
pipe, so it looks just like a writeable file (/tmp/server_name) to any
other process. I don't know how it looks for other OSes.

Michalis
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