Splitting with Regular Expressions

[qwweeeit]

I thank you for your help.
The more flexible solution (Paul McGuire) is interesting but i don't
need such a flexibility. In fact I am implementing a cross-reference
tool  and working on python sources, I don't need the '.' as separator
in order to capture variables and commands.
I thank nevertheless Paul for the advice on using pyparsing.

The other two solutions (Thomas Guettler and Fredrik Lundh) are quite
similar except for the use of "raw". I can use both.