[throwawayffffas]

The way I do it is, I type python in a new terminal, the terminal emulator is running at all times.

So, its ctrl-s + c, python, enter, 1 + 2, enter.

Slightly more work but meh.

[rafram]

Sure, but what does Python return if you type in "$100 in EUR" or "10 pounds in kg"?

[throwawayffffas]

That's what your browser is for.

My main problem with that kind of launcher is that if I write "gimp" on my launcher there is only one correct answer, launching gimp. Everything else is just noise.

The choice to offer all that other functionality detracts from the main one.

[kstrauser]

Launchers compete on their smartness. One that didn’t show Gimp as the top result wouldn’t have users very long. You can also turn off the results you don’t like.