Web backends development using Python

Web backends developmentusing PythonAyun Park

Ayun [email protected] / http://parkayun.kr /

https://github.com/Parkayun

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122 universities

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based on django

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used flask

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used tornado

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tried aiohttp

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django, flask, tornado and

aiohttp12

djangoMost popular Python web framework

Full stack web framework

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Most popular

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Full stackweb framework

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= has almost everything

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Full stackORM

Template Engine

Tests

And more...

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ORM

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ORM

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ORM>>> Foo.objects.filter(bar__contains=’1’)

SELECT "world_foo"."id", "world_foo"."bar", "world_foo"."created_at", "world_foo"."modified_at" FROM "world_foo" WHERE "world_foo"."bar" LIKE ‘%1%’ ESCAPE \'\\\' LIMIT 21

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ORMMySQL

PostgreSQL

Oracle

MSSQL (unofficial)

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template engine

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template enginea lot of useful builtin tags

intcomma

autoescape

linebreaks

also can make custom tags

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testsbased on unittest

TestCase

TransactionTestCase

LiveServerTestCase

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And more...django admin

useful middlewares

session management

protection against csrf attack

migration

And more... in djangoproject.com 25

= django has super productivity

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In my case

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I use django when need web

pages(html).28

django was born for web sites.

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flaskVery popluar Python web framework in developers

Microframework

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Very popular

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Werkzeug

jinja2

useful extensions

Microframework

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Werkzeug

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= WSGI Utility Library

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= HTTP Server using Python

(PEP333)35

= URL Route and Response

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jinja2

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= template engine

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similar with django’s

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Microframework

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= has almost nothing

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= has free

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= useful extensions

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SQLAlchemy (Flask-SQLAlchemy)ORM

Alembic (Flask-Alembic)Migration

Flask-Login

session management

py.test (pytest-flask), nosetest

tests

And more...

useful extensions

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In my case

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I use flask inanytime.

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flask isa microframework.

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tornadoWeb framework

Asynchronous network library

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Web framework

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similar with flask

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= has template engine

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also, similar withdjango’s

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but, It hasn’tenough bulitin

tags.53

Asynchronousnetwork library

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= tornado’s key feature

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After, Python2

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has asyncio

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= has async features

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But, tornado has that

since Python2.59

= has good performancesince Python2

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= can code socketand more

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= even as a container

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In my case

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I use tornado whenbuild websocketand use nosql.

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Async is tornado’skey feature.

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Not use asyncwith rdbms.

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or as a wsgi container

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aiohttpHTTP Client / Server for asyncio

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HTTP Serverfor asyncio.

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= HTTP Serverfor Python3.

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= like a werkzeugin flask.

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= URL Route and Response

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In my case

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I use aiohttp whenbuild websocket

or try experiment.74

There are someasync rdbms driver

for Python3.75

I just started web frameworkbased on aiohttp.

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In githubParkayun/astrid

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In Real World

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Yes, Python is slow.

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check transaction.

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check file io.

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‘’.join((‘a’, ‘b’)) > ‘a’ + ‘b’

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use Cache(redis, memcached)

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uWSGI > gunicorn

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use gevent

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use PyPy

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normal stack

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django / flask

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uWSGI / gunicronnginx / apache

MySQL / PostgreSQL / Oracle / MSSQL

Cache(redis / memcached / rabbitmq)

reverse proxy

Thanks a lot!