All Questions
12 questions
-1
votes
1
answer
823
views
Python async request throwing error : object NoneType can't be used in 'await' expression
I am testing tornado websocket api with streamlit hello example application,
i added a async wrapper to tornado.websocket.WebSocketHandler get method to record websocket connections
# pip3 install ...
0
votes
1
answer
430
views
Tornado 6.1 non-blocking request
Using Tornado, I have a POST request that takes a long time as it makes many requests to another API service and processes the data. This can take minutes to fully complete. I don't want this to block ...
- 65
0
votes
2
answers
667
views
Write back through the callback attached to IOLoop in Tornado
There is a tricky post handler, sometimes it can take a lots of time (depending on a input values), sometimes not.
What I want is to write back whenever 1 second passes, dynamically allocating the ...
- 626
3
votes
2
answers
2k
views
How to replace `yield gen.Task(fn, argument)` with an equivalent asyncio expression?
Problem:
I am trying to update some old code (which I didn't write), which uses an outdated version of Tornado and gen.Task, to use the current version of Tornado and asyncio. This is mostly ...
0
votes
1
answer
394
views
Tornado - How to stop all asynchronous 'await's from on_connection_close
So I have an asynchronous request handler in Tornado, that awaits for some events, after what it writes something to the client and terminates.
Basically it's something like this :
async def post(...
- 4,576
0
votes
0
answers
183
views
Tornado performance issue with MySQLand Redis
I have a tornado server running with MySQL for DB and Redis for cache. I am using web socket to send/receive data. My code is like this:
Server
import logging
import os.path
import uuid
import sys
...
- 139
0
votes
1
answer
1k
views
Combine Asyncio Tcp Server and Tornado Web Socket
I have a asycnio tcp server which is connected to 5 tcp client.
import asyncio
class EchoServerClientProtocol(asyncio.Protocol):
def connection_made(self, transport):
peername = ...
user9018881
1
vote
1
answer
218
views
What my code needs a gen.sleep to execute a function async?
I have the following code written based on Python's Tornado:
def process_data(data):
# To something
def handler(message):
if message['type'] == 'message':
data = message['data']
...
- 42.1k
1
vote
1
answer
80
views
How do asynchronous tasks say they're "done" if there's one thread?
I've written asynchronous programs using Tornado and asyncio, however I've realized I don't understand how asynchronous tasks say they're done.
For example, let's take a look at the asynchronous ...
- 4,049
2
votes
2
answers
725
views
Can I use async and await with Tornado-redis? (Python 3.5)
Tornado 4.3 has added support for PEP 0492 which introduces async and await keywords for defining and calling asynchronous coroutines. Is it possible to use these keywords to call tornado-redis API's ...
- 137
11
votes
1
answer
6k
views
Tornado framework. TypeError: 'Future' object is not callable
I've started to learn Tornado framework sometime ago. I've faced the lack of documentation for unexperienced users and checked also asyncio module docs.
So the problem is, that I have some simple code ...
- 171
3
votes
1
answer
2k
views
Tornado generator resume on any future in list
Is there a behavior/pattern in tornado (or asyncio) to wait for any instead of all Futures in a list ?
yield any_of([future1, future2, future3])
Say future2 is ready then the result should be:
[None,...
- 2,182