> I have a c-module with functions bb_sequence.reverse, > bb_sequence.complement etc. and I want to create a class in python called > bb_sequence ... the original question was about how to add the c-module > into the class ... but I think I am going to rename the c-functions and > wrap them in the python code. That's the best solution. You *could* write some C-level type and inherit from it in a Python class by using the ExtensionClass package, but there's no point unless you really want/need to provide a generally useful C type. > I'd like to evaluate variables with function names, like: > for i in ["reverse" "coplement" "antiparallel"]: > print i,": ",bb_sequence.i That just needs a slight rewrite: for i in ["reverse" "coplement" "antiparallel"]: print i,": ", getattr(bb_sequence, i) getattr() works for method names as well, it simply returns a method object, which can be called like a function. From my current undestanding of your original Tcl example, the Python equivalent would be: for i in ["reverse" "coplement" "antiparallel"]: print i,": ", getattr(bb_sequence, i)(seq) Konrad. -- ------------------------------------------------------------------------------- Konrad Hinsen | E-Mail: hinsen at cnrs-orleans.fr Centre de Biophysique Moleculaire (CNRS) | Tel.: +33-2.38.25.55.69 Rue Charles Sadron | Fax: +33-2.38.63.15.17 45071 Orleans Cedex 2 | Deutsch/Esperanto/English/ France | Nederlands/Francais -------------------------------------------------------------------------------