F. Petitjean wrote: > Le Wed, 29 Jun 2005 09:46:15 +0000 (UTC), Mandus a écrit : > > Hi there, > > > > inspired by a recent thread where the end of reduce/map/lambda in Python was > > discussed, I looked over some of my maps, and tried to convert them to > > list-comprehensions. > > > > This one I am not sure how to conver: > > > > Given three tuples of length n, b,i and d, I now do: > > > > map(lambda bb,ii,dd: bb+ii*dd,b,i,d) > > > > which gives a list of length n. > > res = [ bb+ii*dd for bb,ii,dd in zip(b,i,d) ] > > Hoping that zip will not be deprecated.
Notice that zip doesn't do any functional stuff--it merely manipulates data structures--so it ought not to be lumped in with map, filter, and reduce. Fear not, people: just as the BDFL does not indiscriminately add features, also he does not indiscriminately remove them. zip, though it feels a little exotic, is very useful and serves a purpose that no language feature serves(*), so rest assured it's not going to disappear. (*) Excepting izip, of course, which is more useful than zip and probably should also be a builtin. -- Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
