What is Async & Await in Javascript?

Question

I enabled the deprecation warning in Python 3.5.1 and Python 3.6 dev, but I did not get any warning when assigning to async or await:

$ python -Wd -c "import sys; print(sys.version); async = 33"
3.5.1 (default, Jan 21 2016, 19:59:28)
[GCC 4.8.4]

Is it normal?

Answer 1

Async/await is a new way to write asynchronous code. Async/await is actually built on top of promises. It cannot be used with plain callbacks or node callbacks.
Async/await is, like promises, non blocking. Async/await makes asynchronous code look and behave a little more like synchronous code.