On Jun 12, 9:36 pm, "Terry Reedy" <[EMAIL PROTECTED]> wrote: > "Paddy" <[EMAIL PROTECTED]> wrote in message > > news:[EMAIL PROTECTED] > | > | Iam wondering why the peculiar behavior of map when the function in > | given as None: > > The 'peculiar behavior' is the same as zip (except for padding short > iterators versus truncating long iterators. Map was added years before > zip. After that, map(None,...) was kept for back compatibility. > > In 3.0, the doc for map is > "Return an iterator that applies function to every item of iterable, > yielding the results. If additional iterable arguments are passed, function > must take that many arguments and is applied to the items from all > iterables in parallel. With multiple iterables, the iterator stops when the > shortest iterable is exhausted." > > Using a map defined with None raises > TypeError: 'NoneType' object is not callable > > tjr
I really should get into the habit of reading the 3.0 docs before asking questions :-) My original question came about after answering this query: http://gmcnaughton.livejournal.com/27955.html?thread=70451#t70451 - Paddy. -- http://mail.python.org/mailman/listinfo/python-list
