Kermit Rose wrote: >>>> factor30.__file__ > 'c:\\math\\factoring\\factor30.py' > > Ok. Now I understand it. > > The module is named factor30. > > The file is named factor30.py > > I presume that if I created another library in the same directory > in a file named factor31.py > that it would create a module named factor31. ??? Yes. Try it and see! Kent