<[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > On 2 avr, 22:32, "Primoz Skale" <[EMAIL PROTECTED]> wrote: >> >> I also understand (fairly) how to collect arguments. For example, >> >> let's >> >> define another function: >> >> >> def f(*a): >> >> print a >> >> > This means that f takes any number of optional positional arguments. >> > If nothing is passed, within f, 'a' will be an empty tuple. Note that >> > this is *not* the usual way to define a function taking multiple >> > (mandatory) arguments. >> >> M. Lutz in "Learning Python" had defined it this way. What is the *usual* >> way in this case? > > You mean : "what's the usual way to define a function taking multiple > *mandatory* arguments" ? I'd think it's explained in your book ??? > > def f(a, b, c): > print a, b, c > > But this is such a cs101 point that we're surely misunderstanding each > other here. >
Yes, this was misunderstanding. I thought you meant defining with the *a, and not with a,b,c, etc....Thanks anyway :) >> >> > or (slightly more involved, and certainly overkill): >> >> > def with_default_args(default): >> > def decorator(func): >> > def wrapper(*args): >> > if not args: >> > args = default >> > return func(*args) >> > return wrapper >> > return decorator >> >> > @with_default_args((0,)) >> > def f(*a): >> > print a[0] >> >> Now, this is interesting. Thanks! :) > > Dont take this as a "recommanded" solution to your problem - it was > (mostly) to be exhaustive (and a bit on the "showing off" side too to > be honest). > No of course not - but it is interesting... P. -- http://mail.python.org/mailman/listinfo/python-list
