Ранее я уже упоминал о другой фишке из ˍˍfutureˍˍ , это оператор деления.
from __future__ import division
Суть проста. Раньше сложность типа данных результата поределялась типом самого сложного операнда.
Например:
int/int => int
int/float => float
В первом случае оба операнда int, значит и результат будет int. Во втором float более сложный тип, поэтому результат будет float.
Если нам требуется получить дробное значение при делении двух int то приходилось форсированно один из операндов конверировать в float.
12/float(5) => float
Но с новой "философией" это не требуется. В Python3 "floor division" заменили на "true division" а старый способ теперь работает через оператор "//".
>>> 3/2
1.5
>>> 3//2
1
То есть теперь деление int на int даёт float если результат не целое число.
В классах теперь доступны методы __floordiv__() и __truediv__() для определения поведения с этими операторами.
Данный переход описан в PEP238.
#pep#2to3#basic
http://aiohttp.readthedocs.io/en/stable/web.html#aiohttp-web-websockets
In order to implement a #web_server, first create a #request handler.
A request handler is a coroutine or regular function that accepts a Request instance as its only parameter and returns a Response instance:
#aiohttp#asyncio
from aiohttp import web
async def hello(request):
return web.Response(text="Hello, world")
Next, create an Application instance and register the request handler with the application’s #router on a particular HTTP method and path:
https://github.com/aio-libs/aiohttp/blob/master/docs/web_reference.rst
Server Reference
#asyncio#aiohttp#Request#BaseRequest#Server#client#Router#Resource
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