On Sat, Nov 25, 2017 at 3:37 PM, Guido van Rossum <guido@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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