then you can use quit() as long as you understand what it does.

Correction: this should actually read:

then you can use exit() as long as you understand what it does.

but now you have changed the way in which the Python script is executed. In the previous example you executed python directly, now you start a cmd that executes the python script itself.
As said before, if you want to switch to interactive mode, use os._exit(1) for example, if not, then you can use quit() as long as you understand what it does.

The code works fine when ran from a cmd window.

Too bad.

Read about what sys.exit does.
If interactive mode is required, then use os._exit(WHATEVER_NUMBER) instead.

Hello,

I’d like to find how to get NppExec to display the output from a Python script in a console within NPP so I don’t need to switch back and forth to Windows’ cmd window.

Then congratulations, you have succeeded. The screenshot you included showed it is indeed putting the output into the Book exec console in Notepad++.

Unfortunately, your Python has an error, so the error is the only output that you see. Try a simple Hello World to see it “work”

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update: sorry, that’s showing my obvious lack of knowledge about exit in Python; see more knowledgeable posts below