On Thu, 21 Oct 2010 19:53:53 -0700 John Nagle <na...@animats.com> wrote:
> On 10/21/2010 2:51 PM, Chris Rebert wrote: > > On Thu, Oct 21, 2010 at 2:36 PM, Sean Choi<gne...@gmail.com> wrote: > >> I found two similar questions in the mailing list, but I didn't > >> understand the explanations. > >> I ran this code on Ubuntu 10.04 with Python 2.6.5. > >> Why do the functions g and gggg behave differently? If calls > >> gggg(3) and g(3) both exit their functions in the same state, why > >> do they not enter in the same state when I call gggg(4) and g(4)? > >> > >> # > >> ---------------------------------------------------------------------- > >> my code: def gggg(a, L=[]): > > > > This is a common newbie stumbling-block: Don't use lists (or > > anything mutable) as default argument values > > That really should be an error. > What do you mean? That using a list as default arguments should throw an error? While not very commonly needed, why should a shared default argument be forbidden? /W -- To reach me via email, replace INVALID with the country code of my home country. But if you spam me, I'll be one sour Kraut. -- http://mail.python.org/mailman/listinfo/python-list
