"George Sakkis" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]
> "Steven Bethard" <[EMAIL PROTECTED]> wrote: >> Dict comprehensions were recently rejected: >> http://www.python.org/peps/pep-0274.html >> The reason, of course, is that dict comprehensions don't gain you much >> at all over the dict() constructor plus a generator expression, e.g.: >> dict((i, chr(65+i)) for i in range(4)) > Sure, but the same holds for list comprehensions: list(i*i for i in > xrange(10)). The difference is historic I guess; list comprehensions > preceded generator expressions and so they cannot be removed, at least > not before 3.0. I wonder if they will/should be in the language when > the constraint of backwards compatibility is lifted. Guido has asked himself the same question. Some developers who love l.c.s are sure they will stay. I am not. I think it might depend on whether they have any real advantages in the context of the 3.0 engine and design, which don't exist yet. > IMO they should > not (TIOOWTDI, uniformity among builtin data structures, not > overwhelmingly more useful than set or dict comprehensions), but > there's a long way till that day. Yes. Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
