bug ???

[Skip Montanaro]

    Franck> I don't understand a weird behavior of python
    ...
    Franck> def function2(var1, var2, var3 = []):
    Franck>      .....

    Franck> Anyone can help me ?

Sure.  Read FAQ 6.25:

    http://www.python.org/cgi-bin/faqw.py?req=show&file=faq06.025.htp

Skip