![SOME BEST PRACTICES
use factory pattern for apps:
def create_app():
app = Sanic(__name__)
init_exception_handling(app=app)
app.add_route(
handle_transcript,
'/v2/conversations_transcript',
methods=['POST'])
app.add_route(
handle_ack,
'/v2/conversations_transcript',
methods=['OPTIONS'])
return app](https://image.slidesharecdn.com/pyconid-sanic-171210173211/85/Sanic-Experience-Blazing-Fast-Python-Web-Framework-17-320.jpg)
![SOME BEST PRACTICES
separate handlers from route for easier testing
from app.handlers.transcript import handle_transcript
app = Sanic(__name__)
init_exception_handling(app=app)
app.add_route(
handle_transcript,
'/v2/conversations_transcript',
methods=['POST'])](https://image.slidesharecdn.com/pyconid-sanic-171210173211/85/Sanic-Experience-Blazing-Fast-Python-Web-Framework-19-320.jpg)
Sanic: Experience Blazing Fast Python Web Framework
- 1. SANIC EXPERIENCE BLAZING FAST PYTHON WEB FRAMEWORK PyCon ID Surabaya, Indonesia 2017
- 2. Fauzan Erich Emmerling VP Integration @ prismapp.io @femmerling (GitHub, twitter, IG) pythonista since 2010 http://www.emfeld.com currently active in Python-ID Jogja
- 4. WHY WAS PYTHON SLOW ▸ It’s interpreted ▸ It’s dynamically typed ▸ In python 2.x concurrency is a big mess ▸ Async is hard ▸ The notoriously famous GIL
- 6. WHAT HAPPENS AT 3.X?? ▸ Still interpreted ▸ Better performance ▸ Still dynamically typed but now comes with type hinting ▸ Since 3.5 async is a walk in the park ▸ GIL is still there but Asyncio saves us, BIG TIME
- 7. ENTER UVLOOP
- 8. “a full, drop-in replacement for the asyncio event loop. uvloop is written in Cython and built on top of libuv. uvloop makes asyncio fast. In fact, it is at least 2x faster than nodejs, gevent, as well as any other Python asynchronous framework” Yuri Selivanov WHAT IS UVLOOP
- 10. DUDE, IT’S MY TURN NOW!!! GOTTA GO FAST!!!
- 12. WHAT IS IT? ▸ a python 3.5+ micro framework thats written to go fast ▸ small and contained ▸ inspired a lot by Flask, that’s why I ❤ it ▸ accepts async handlers so the we can use shiny async/ await syntax
- 13. WHY USE SANIC? ▸ super easy to learn ▸ can be a micro framework up to a full monolith, just like flask ▸ async capabilities, better concurrency ▸ performs like that of Go or NodeJS but with better syntax ▸ great docs ▸ extensions are growing ▸ however currently no wheel for uvloop on windows yet ▸ set your own workers
- 14. FEATURES ▸ async request handling ▸ http and websocket ▸ class based views ▸ blueprints ▸ configurations ▸ cookies
- 15. HOW TO START USING IT? ▸ make sure you have python 3.5+ ▸ $ pip install sanic ▸ start coding
- 16. DOES THIS RING A BELL? from sanic import Sanic from sanic import response as sanic_response from services import get_image_content, get_mimetype, set_expiry_headers app = Sanic(__name__) @app.route('/<image_url:path>') async def index(request, image_url): content_type = get_mimetype(image_url=image_url) headers = set_expiry_headers() async def get_image(response): content = await get_image_content(image_url) response.write(content) return sanic_response.stream( get_image, content_type=content_type, headers=headers) if __name__ == '__main__': app.run(host='0.0.0.0', port=5000, debug=True, workers=4)
- 17. SOME BEST PRACTICES use factory pattern for apps: def create_app(): app = Sanic(__name__) init_exception_handling(app=app) app.add_route( handle_transcript, '/v2/conversations_transcript', methods=['POST']) app.add_route( handle_ack, '/v2/conversations_transcript', methods=['OPTIONS']) return app
- 18. SOME BEST PRACTICES map exceptions def init_handled_exceptions(app): if app is None: raise AppError('`app` is required') @app.exception(AppError) def handled_exceptions(request, exception): error = create_response( payload=exception.to_dict(), status_code=exception.status_code) logger.error( exception.message, error=error) return response.json( error.payload, headers=error.headers, status=exception.status_code)
- 19. SOME BEST PRACTICES separate handlers from route for easier testing from app.handlers.transcript import handle_transcript app = Sanic(__name__) init_exception_handling(app=app) app.add_route( handle_transcript, '/v2/conversations_transcript', methods=['POST'])
- 20. SANIC IN REAL LIFE ▸ Scarlett Project ▸ Translates image streams from http to https ▸ Handles around 200 req/s per worker ▸ Runs behind Gunicorn with 4 workers running ▸ Only need 1 docker container for now ▸ Average response time is 10ms ▸ Developed in 1.5 hours
- 21. SOMETIMES YOU GOTTA RUN BEFORE YOU CAN WALK Tony Stark OUR MANTRA AT PRISM
- 22. QUESTIONS? you can also ask on: twitter: @femmerling mail: erich@emfeld.com
- 23. THANK YOU in case you’re wondering.. Yes, we’re hiring!!! fauzan@prismapp.io