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Date: Fri, 8 May 2015 15:09:21 +1000
Subject: Re: asyncio: What is the difference between tasks, futures, and coroutines?
From: Chris Angelico <rosuav@gmail.com>
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On Fri, May 8, 2015 at 2:53 PM, Rustom Mody <rustompmody@gmail.com> wrote:
> Yeah I know
> And if python did not try to be so clever, I'd save some time with
> student-surprises
>
>> In a program, an expression
>> statement simply discards its result, whether it's None or 42 or
>> [1,2,3] or anything else. You could write an interactive interpreter
>> that has some magic that recognizes that certain functions always
>> return None (maybe by checking their annotations), and omits printing
>> their return values, while still printing the return values of other
>> functions.
>
>
> Hoo Boy!  You seem to be in the 'the-more-the-better' (of magic) camp

No way! I wouldn't want the interactive interpreter to go too magical.
I'm just saying that it wouldn't break Python to have it do things
differently.

>> I'm not sure what it'd gain you, but it wouldn't change the
>> concepts or semantics surrounding None returns.
>
> It would sure help teachers who get paid by the hour and would rather spend
> time on technical irrelevantia than grapple with significant concepts

Why have the concept of a procedure? Python's rule is simple: Every
function either returns a value or raises an exception. (Even
generators. When you call a generator function, you get back a return
value which is the generator state object.) The procedure/function
distinction is irrelevant.

ChrisA