On Aug 29, 8:39 am, Alex <[EMAIL PROTECTED]> wrote: > Hye, > > I was just wondering what is the difference between > > >> if my_key in mydict: > >> ... > > and > > >> if mydict.has_keys(my_key): > >> ... > > I've search a bit in the python documentation, and the only things I > found was that they are "equivalent". > > But in this (quiet old) sample ( "http://aspn.activestate.com/ASPN/ > Cookbook/Python/Recipe/59875" ), there is difference between the two > notation. > > Thanks in advance
Weird. Hetland's book, "Beginning Python" states that it's a matter of taste. Martelli's "Python Cookbook 2nd Ed." says to use the get() method instead as you never know if a key is in the dict. However, I can't seem to find any reference to has_key in his book. According to Chun in "Core Python Programming", has_key will be obsoleted in future versions of Python, so he recommends using "in" or "not in". There's your non-answer. Hope that helps. Mike -- http://mail.python.org/mailman/listinfo/python-list
