Jonathan Gardner a écrit :
On Aug 27, 5:13 am, jvpic <jv...@free.fr> wrote:
Hi,
Learning Python, I understand the mechanism of : closure, __new__,
descriptors, decorators and __metaclass__, but I interrogate myself on
the interest of those technics ?
May somebody explain me the interest ?
I assume you are asking, "Why do these features exist? What makes them
useful? When would I use them?"
For that, you should re-read the documentation and discussion
surrounding them. The short answer is that the above makes your job,
as a programmer easier. It's easier because you have to write less
code, read less code, and your code has fewer bugs.
I think the OP is mostly looking for practical use cases. FWIW, when I
discovered Python's "lambda" (I only knew a couple low-level imperative
languages by that time), I really wondered what an anonymous function
could be used for !-)
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