On Mar 23, 4:14 pm, Paddy <[EMAIL PROTECTED]> wrote: > On Mar 23, 3:53 pm, John Nagle <[EMAIL PROTECTED]> wrote: > > > What's the cheapest way to test for an empty dictionary in Python? > > > if len(dict.keys() > 0) : > > > is expensive for large dictionaries, and makes loops O(N^2). > > > John Nagle > > As others have stated, if <container object>: is false for built-in > container types such as dicts, lists, sets, tuples,... > Its nice to make any of your own container types follow the same > convention too. > > - Paddy.
I missed out *empty* didn't I. Its false for empty container types. - Paddy. -- http://mail.python.org/mailman/listinfo/python-list
