[Alan Kennedy] > On jython 2.1, I use something like this > #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > try: > enumerate > except NameError: > def enumerate(iterable): > results = [] ; ix = 0 > for item in iterable: > results.append( (ix, item) ) > ix = ix+1 > return results
[Fredrik Lundh] >> at least in CPython, using a user-defined enumerate function is a bit >> slower than using the built-in version. [Alan Kennedy] >> Who's using a user-defined enumerate on cpython? [Fredrik Lundh] > anyone targeting older Python platforms. You mean python platforms where there is no built-in enumerate? Your comment makes "using a user-defined enumerate [on cpython] is slower than using the built-in version" makes no sense in relation to the code I posted, which only defines a user-defined enumerate *if there is no builtin enumerate*. [Alan Kennedy] >> On cpython, the reference to enumerate doesn't generate a NameError, [Fredrik Lundh] > > python > Python 2.2.3 (#42, May 30 2003, 18:12:08) > >>> enumerate > Traceback (most recent call last): > File "<stdin>", line 1, in ? > NameError: name 'enumerate' is not defined Right: there is no built-in enumerate on cpython 2.2. So how could a user-defined one be slower than it? Of course, my cpython comment referred to recent cpythons, i.e. 2.3, 2.4, 2.5. The code I supplied works on all versions of python, and *never* replaces the built-in enumerate, if there is one. So what's the problem, exactly? regards, -- alan kennedy ------------------------------------------------------ email alan: http://xhaus.com/contact/alan -- http://mail.python.org/mailman/listinfo/python-list
