A Script any languange wich manipulates the commandline args of a service

[Sven]

Hello TcAdmin friends, 

i recently got an idea wich i am not able to solve. I want a script preferably in Python wich is able to manipulate the CommandlineArguments within a GameService.

For example after a Rust Steamupdate i want to change the CommandlineArgument $"HostName" to change to "Hostname.. Updated." via a "after steam update custom script"

I tried to manipulate the server.cfg file wich is not the way because it doesnt load in the first restart.. and the server title may not change

Is it enough to manipulate the variable $HostName? Any help appreciated.