Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Programação Assíncrona com Asyncio
Search
Allisson Azevedo
March 25, 2017
Technology
0
99
Programação Assíncrona com Asyncio
Palestra ministrada no PythonDay Campina Grande 2017
Allisson Azevedo
March 25, 2017
Tweet
Share
More Decks by Allisson Azevedo
See All by Allisson Azevedo
Crawleando sites com NodeJS
allisson
0
150
Introdução a linguagem Go
allisson
0
310
Docker + Django
allisson
5
630
Construindo um micro framework web em Python
allisson
0
230
Consumindo API's OAuth{1,2} com Python
allisson
1
180
Tarefas assíncronas com django e celery
allisson
1
24k
Deploy completo de uma aplicação Django
allisson
6
500
Desenvolvimento Web com Django
allisson
0
140
Otimizando sites com o nosql redis
allisson
4
160
Other Decks in Technology
See All in Technology
ポストコロナ時代の SaaS におけるコスト削減の意義
izzii
1
470
20250708オープンエンドな探索と知識発見
sakana_ai
PRO
4
1k
対話型音声AIアプリケーションの信頼性向上の取り組み
ivry_presentationmaterials
3
1k
Snowflake Intelligenceという名のAI Agentが切り開くデータ活用の未来とその実現に必要なこと@SnowVillage『Data Management #1 Summit 2025 Recap!!』
ryo_suzuki
1
160
An introduction to Claude Code SDK
choplin
2
1k
AIエージェントが書くのなら直接CloudFormationを書かせればいいじゃないですか何故AWS CDKを使う必要があるのさ
watany
18
7.6k
ゼロから始めるSREの事業貢献 - 生成AI時代のSRE成長戦略と実践 / Starting SRE from Day One
shinyorke
PRO
0
110
三視点LLMによる複数観点レビュー
mhlyc
0
230
「Chatwork」のEKS環境を支えるhelmfileを使用したマニフェスト管理術
hanayo04
1
400
OpenTelemetryセマンティック規約の恩恵とMackerel APMにおける活用例 / SRE NEXT 2025
mackerelio
3
2k
ソフトウェアQAがハードウェアの人になったの
mineo_matsuya
3
200
Maintainer Meetupで「生の声」を聞く ~講演だけじゃないKubeCon
logica0419
0
110
Featured
See All Featured
Designing Experiences People Love
moore
142
24k
Building Better People: How to give real-time feedback that sticks.
wjessup
367
19k
Building Flexible Design Systems
yeseniaperezcruz
328
39k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
44
2.4k
Building Applications with DynamoDB
mza
95
6.5k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
8
340
Producing Creativity
orderedlist
PRO
346
40k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
656
60k
How GitHub (no longer) Works
holman
314
140k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.7k
A better future with KSS
kneath
238
17k
A designer walks into a library…
pauljervisheath
207
24k
Transcript
PROGRAMAÇÃO ASSÍNCRONA COM ASYNCIO PythonDay Campina Grande 2017 Allisson Azevedo
1
ALLISSON AZEVEDO allissonazevedo.com youtube.com/user/allissonazevedo github.com/allisson twitter.com/allisson linkedin.com/in/allisson/ allisson.github.io/slides/
[email protected]
2
THE C10K PROBLEM Como lidar com 10k conexões simultâneas http://www.kegel.com/c10k.html
3
CONCORRÊNCIA Asynchronous I/O O exemplo do garçom Não confundir com
paralelismo 4
PROGRAMAÇÃO SÍNCRONA import time import requests from github import REPOS,
ACCESS_TOKEN start = time.time() for repo_url in REPOS: response = requests.get(repo_url, params={'access_token': ACCESS repo_info = { 'name': response['name'], 'full_name': response['full_name'], 'stargazers_count': response['stargazers_count'] } print(repo_info) end = time.time() print('Tempo de execução={:.2f} segundos'.format(end - start)) 5
PROBLEMAS COM PROGRAMAÇÃO SÍNCRONA Uma requisição http por vez 6
CONCORRÊNCIA USANDO THREADS import time import threading import queue import
requests from github import REPOS, ACCESS_TOKEN def grab_data_from_queue(): while not q.empty(): repo_url = q.get() response = requests.get(repo_url, params={'access_token' repo_info = { 'name': response['name'], 'full_name': response['full_name'], 'stargazers_count': response['stargazers_count'] } 7
PROBLEMAS COM THREADS Consumo de recursos Global Interpreter Lock (GIL)
8
CONCORRÊNCIA USANDO PROCESS import time import multiprocessing import requests from
github import REPOS, ACCESS_TOKEN def grab_data_from_queue(): while not q.empty(): repo_url = q.get() response = requests.get(repo_url, params={'access_token' repo_info = { 'name': response['name'], 'full_name': response['full_name'], 'stargazers_count': response['stargazers_count'] } print(repo_info) 9
PROBLEMAS COM PROCESS Consumo de recursos 10
CONCORRÊNCIA USANDO CONCURRENT.FUTURES import time from concurrent import futures import
requests from github import REPOS, ACCESS_TOKEN def get_repo_info(repo_url): response = requests.get(repo_url, params={'access_token': ACCESS repo_info = { 'name': response['name'], 'full_name': response['full_name'], 'stargazers_count': response['stargazers_count'] } print(repo_info) 11
PROBLEMAS COM CONCURRENT.FUTURES ThreadPoolExecutor - usa threads ProcessPoolExecutor - usa
process 12
ASYNCHRONOUS I/O COM PYTHON Twisted Tornado Eventlet Gevent Asyncio 13
ASYNCIO Python 3.4+ Tulip PEP-3156 14
HELLO WORLD import asyncio async def hello_world(): print('Hello World!') loop
= asyncio.get_event_loop() loop.run_until_complete(hello_world()) 15
HELLO WORLD COM TASKS import asyncio async def hello_world(name): print('Hello
World, {}!'.format(name)) loop = asyncio.get_event_loop() tasks = [] for name in ('fulano', 'cicrano', 'beltrano'): task = asyncio.ensure_future(hello_world(name)) tasks.append(task) loop.run_until_complete(asyncio.wait(tasks)) 16
CONCORRÊNCIA USANDO ASYNCIO import time import asyncio import aiohttp from
github import REPOS, ACCESS_TOKEN async def get_repo_info(repo_url): async with aiohttp.ClientSession() as session: async with session.get(repo_url, params={'access_token': ACC response_data = await response.json() repo_info = { 'name': response_data['name'], 'full_name': response_data['full_name'], 'stargazers_count': response_data['stargazers_count' } print(repo_info) 17
AIO LIBS https://github.com/aio-libs https://github.com/python/asyncio/wiki/ThirdParty 18
PACO import time import paco import aiohttp from github import
REPOS, ACCESS_TOKEN async def get_repo_info(repo_url): async with aiohttp.ClientSession() as session: async with session.get(repo_url, params={'access_token': ACC response_data = await response.json() repo_info = { 'name': response_data['name'], 'full_name': response_data['full_name'], 'stargazers_count': response_data['stargazers_count' } print(repo_info) 19
AIOHTTP from aiohttp import web async def handle(request): return web.json_response({'message':
'Hello World'}) app = web.Application() app.router.add_get('/', handle) web.run_app(app, host='127.0.0.1', port=8080) 20
SANIC from sanic import Sanic from sanic.response import json app
= Sanic() @app.route('/') async def test(request): return json({'message': 'Hello World'}) if __name__ == '__main__': app.run(host='127.0.0.1', port=8080) 21
AIOREDIS import asyncio import aioredis loop = asyncio.get_event_loop() async def
main(): redis = await aioredis.create_redis(('localhost', 6379), loop=lo await redis.set('key', 'hello world') val = await redis.get('key') print(val) redis.close() await redis.wait_closed() loop.run_until_complete(main()) 22
AIOMCACHE import asyncio import aiomcache loop = asyncio.get_event_loop() async def
main(): mc = aiomcache.Client('127.0.0.1', 11211, loop=loop) await mc.set(b'key', b'hello world') value = await mc.get(b'key') print(value) loop.run_until_complete(main()) 23
AIOPG import asyncio import aiopg from speakers import SPEAKERS dsn
= 'dbname=pythonday user=pythonday password=pythonday host=127. async def get_pool(): return await aiopg.create_pool(dsn) async def create_table(): pool = await get_pool() async with pool.acquire() as conn: async with conn.cursor() as cur: await cur.execute('DROP TABLE IF EXISTS speakers') 24
AIOPG SQLALCHEMY import asyncio from aiopg.sa import create_engine import sqlalchemy
as sa from speakers import SPEAKERS metadata = sa.MetaData() speakers_table = sa.Table( 'speakers', metadata, sa.Column('id', sa.Integer, primary_key=True), sa.Column('name', sa.String(255)) ) async def get_engine(): return await create_engine( 25
PYTEST-ASYNCIO import pytest import aiohttp from github import REPOS, ACCESS_TOKEN
async def get_repo_info(repo_url): async with aiohttp.ClientSession() as session: async with session.get(repo_url, params={'access_token': ACC response_data = await response.json() return { 'name': response_data['name'], 'full_name': response_data['full_name'], 'stargazers_count': response_data['stargazers_count' } 26
PERGUNTAS? 27
OBRIGADO! 28