in the past, I used to put future directly into eventloop to perform run_until_complete, interview. When an interviewer asked me how to schedule the program, I was completely confused. May I ask how you are dispatched? ...
has the following code. In my expectation, using two browser windows (A _ Magi B window) to access http: 127.0.0.1:8000 at the same time, the total time to wait for the two pages to load should be close to 10 seconds, but it actually takes 20 seconds,...
A json file with millions of lines needs to be cleaned and the cleaned structured data needs to be re-stored as a csv file. Try to use pandas s dataframe to dump cleaned data items, but find that the speed of conventional cleaning is too slow to write ...
The code is as follows. The index function handles the incoming request, init initializes the server, and the rest is the code to create the server @asyncio.coroutine def index(request): print( one connection come... ) yield from asyncio.slee...
this is how aiohttp officially requests a single url. What should I do if I request multiple url and get the content? import aiohttp import asyncio async def fetch(session, url): async with session.get(url) as response: return await respon...
the following code simulates the use of two threads to manage event loop: import time import asyncio import threading async def task(c, i): for _ in range(i): print(c) await asyncio.sleep(1) return i def thread(loop): -sharp ...
problem description: when I was working on the actual combat article of Liao Xuefeng, I had a question when operating the database. I first defined two co-programs, and then defined a main co-program await to execute the two co-programs sequentially...
import asyncio import sqlalchemy as sa from aiomysql.sa import create_engine @asyncio.coroutine def go(): engine = yield from create_engine(user= root ,db= test ,host= 127.0.0.1 ,password= root ) metadata = sa.MetaData(bind=engine) ...
CREATE PROCEDURE test () BEGIN update vmc_preselling_activity SET last_modify = now () WHERE activity_id = 1818; END; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the...
try{ setTimeout(()=>{ d }) c; c is undefined }catch(e){ console.log(e.message) }...
learn that the rounding rule of JavaScript s toFixed method is banker rounding . that is: rounded into consideration, five is not zero, five is zero, five is parity, five years ago is even should give up, five before is odd to enter one 11.556 = ...
When is returned to the front-end status code, is the front-end status code given according to the judgment of the back-end itself? Is there still some official way? For beginners to learn the back end, please let me know async selectData(ctx) { ...
suppose there are 100 questions on a test paper, each with a score of 1 out of 100. Each question has four options (all single-choice questions). now many people have done this paper, and we have all the answer information and scores. Note: we do not k...