On 11/15/2014 8:24 AM, Marko Rauhamaa wrote:
I'd take top-posting if I were enlightened about how decorators could be
valuable.
Here is part of the original rationale.
@deco(arg)
def f: suite
is (for this discussion) equivalent to
def f: suite
f = deco(arg)(f)
The latter requires writing 'f' 3 times instead of 1. Now suppose to
meet external requirements, such as interfacing to Objective C, you had
to wrap dozens of functions, each with long names, up to 30 chars, with
multiple components. You would then become enlightened.
Once the idea of making function wrapping easier emerged, many other
applications emerged. Various stdlib modules define decorators.
If you do not need to wrap functions, easy wrapping might seem useless
to you. That's fine. You know they are there should you ever have need.
--
Terry Jan Reedy
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