Build a GUI Plugin in python and interaction with a

Development
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I want to Build a GUI Plugin in python, if you could send to any examples it would be great.
And I also want that a button on GUI that run a EXE (that I already made and it writes a py file). And after writing it i want that run automatically on Python Shell of paraview.

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Build a GUI Plugin in python

https://gitlab.kitware.com/paraview/paraview/-/tree/master/Examples/Plugins/PythonAlgorithm

And I also want that a button on GUI that run a EXE

Just run it in python and add the python script as a macro