your solution is realy amazing :) only three lines ...
but do we need while?

Very short and cool but some cases are not totally treated efficiently as you stop at the end.

For instance : ") (a very long) (example) (and) there is also other ones..."

I know, it's difficult to have a short and efficient solution at once :-)
Mine is very long and not python oriented like yours. I prefer yours !

nice solution, i like it