En Thu, 22 May 2008 20:38:39 -0300, Andreas Matthias <[EMAIL PROTECTED]> escribió:
> [EMAIL PROTECTED] wrote: > >> actually i ddin't think about the fact that you're overloading dict, which >> can already take multiple values in getitem > > Oh, I didn't know that. I totally misinterpreted the error message. > > >> so how about >> >> class crazy: pass >> >> and then in your dict class: >> >> def __getitem__(*args): > > Apparently, args already is a tuple, so this should be: > > def __getitem__(self, args): > > Is this documented somewhere? I couldn't find it anywhere. No, that's not correct. First, there is nothing special with the arguments to dict.__getitem__ -- except that the syntax obj[index] provides a delimiter and it allows for obj[a,b] as a shortcut for obj[(a,b)] -> obj.__getitem__((a,b)) You may use the *args notation in any function; it is always a tuple (a singleton, when you call the function with only one argument) py> def foo(*args): print args ... py> foo(1) (1,) py> foo(1,2) (1, 2) py> foo((1,2)) ((1, 2),) Compare with: py> def bar(arg): print arg ... py> bar(1) 1 py> bar(1,2) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: bar() takes exactly 1 argument (2 given) py> bar((1,2)) (1, 2) -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
