"Bart Ogryczak" <[EMAIL PROTECTED]> wrote: > On Mar 5, 11:22 am, [EMAIL PROTECTED] wrote: >> messagesReceived = dict.fromkeys(("one","two"), {}) > > This creates two references to just *one* instance of empty > dictionary. > I'd do it like: > messagesReceived = dict([(key, {}) for key in ("one","two")]) > Alternatively use a defaultdict (Python 2.5) and you don't need to know the keys in advance:
>>> from collections import defaultdict >>> messagesReceived = defaultdict(dict) >>> messagesReceived['one']['123'] = 11111 >>> messagesReceived['two']['121'] = 22222 >>> messagesReceived['two']['124'] = 43333 >>> messagesReceived defaultdict(<type 'dict'>, {'two': {'121': 22222, '124': 43333}, 'one': {'123': 11111}}) -- http://mail.python.org/mailman/listinfo/python-list