sanic/docs/sanic/asyncio_python37.rst
2019-03-28 01:05:39 +00:00

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Python 3.7 AsyncIO examples
###########################
With Python 3.7 AsyncIO got major update for the following types:
- asyncio.AbstractEventLoop
- asyncio.AbstractServer
This example shows how to use sanic with Python 3.7, to be precise: how to retrieve an asyncio server instance:
.. code:: python
import asyncio
import socket
import os
from sanic import Sanic
from sanic.response import json
app = Sanic(__name__)
@app.route("/")
async def test(request):
return json({"hello": "world"})
server_socket = '/tmp/sanic.sock'
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
try:
os.remove(server_socket)
finally:
sock.bind(server_socket)
if __name__ == "__main__":
loop = asyncio.get_event_loop()
srv_coro = app.create_server(
sock=sock,
return_asyncio_server=True,
asyncio_server_kwargs=dict(
start_serving=False
)
)
srv = loop.run_until_complete(srv_coro)
try:
assert srv.is_serving() is False
loop.run_until_complete(srv.start_serving())
assert srv.is_serving() is True
loop.run_until_complete(srv.serve_forever())
except KeyboardInterrupt:
srv.close()
loop.close()
Please note that uvloop does not support these features yet.