[Python-Dev] Tricky way of of creating a generator via a comprehension expression
David Mertz
mertz at gnosis.cx
Sat Nov 25 19:20:34 EST 2017
On Sat, Nov 25, 2017 at 3:37 PM, Guido van Rossum <guido at python.org> wrote:
> Maybe you didn't realize async/await don't need an event loop? Driving an
> async/await-based coroutine is just as simple as driving a yield-from-based
> one (`await` does exactly the same thing as `yield from`).
>
I realize I *can*, but it seems far from straightforward. I guess this is
really a python-list question or something, but what is the async/await
spelling of something toy like:
In [1]: def fib():
...: a, b = 1, 1
...: while True:
...: yield a
...: a, b = b, a+b
...:
In [2]: from itertools import takewhile
In [3]: list(takewhile(lambda x: x<200, fib()))
Out[3]: [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144]
> Maybe the rest of the discussion should be about deprecation vs.
> SyntaxError in Python 3.7.
>
I vote SyntaxError, of course. :-)
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