たのしい FastAPI

社内勉強会用につくった FastAPI の布教資料です。
書けなかった内容は改めて会社ブログに書く予定です。

Transcript

1. ͨͷ͍͠ ര଎Ͱͭ͘ΕͯɺAPI࢓༷ॻʹ΋ͳΔʂ @kimihiro_n 3෼μΠδΣετ൛
2. Hello FastAPI
3. FastAPI Ͱ HelloWorld from fastapi import FastAPI app = FastAPI() @app.get("/") def hello(): return {"Hello": "World"} $ pip install fastapi uvicorn $ uvicorn main:app --reload ref. https://fastapi.tiangolo.com/
4. Hello World
5. FastAPIͷԿ͕͏Ε͍͔͠ • FlaskʹࣅͨγϯϓϧͳViewఆٛ • ϗοτϦϩʔυରԠ • ϦΫΤετɾϨεϙϯεͷܕఆٛ • υΩϡϝϯτࣗಈੜ੒ • ඇಉظ(asyncio)ରԠ
6. FastAPI Ͱܕఆٛ
7. FastAPI Ͱ ܕΛ͚ͭΔ from fastapi import FastAPI from pydantic import BaseModel app = FastAPI() class Response(BaseModel): hello: str @app.get("/", response_model=Response) def hello(): return Response(hello="world")
8. FastAPI Ͱ ܕΛ͚ͭΔ from fastapi import FastAPI from pydantic import BaseModel app = FastAPI() class Response(BaseModel): hello: str @app.get("/", response_model=Response) def hello(): return Response(hello="world") ϨεϙϯεͷܕΛఆٛ
9. FastAPI Ͱ ܕΛ͚ͭΔ from fastapi import FastAPI from pydantic import BaseModel app = FastAPI() class Response(BaseModel): hello: str @app.get("/", response_model=Response) def hello(): return Response(hello="world") View ͷϨεϙϯε͕ ͜ͷܕͰ͋Δ͜ͱΛએݴ
10. FastAPI Ͱ ܕΛ͚ͭΔ from fastapi import FastAPI from pydantic import BaseModel app = FastAPI() class Response(BaseModel): hello: str @app.get("/", response_model=Response) def hello(): return Response(hello="world") σʔλΛೖΕͯ ͦͷ··ฦ͢
11. ܕఆٛͰԿ͕ى͜Δͷ͔ • ࣙॻΛ͔ͭΘͳ͍҆શͳίʔσΟϯά • ϨεϙϯεͷܕͷνΣοΫ ◦ ܕ͕Ϛον͠ͳ͍৔߹Τϥʔʹ ◦ ΋ͪΖΜϦΫΤετͷόϦσʔγϣϯ΋ • API υΩϡϝϯτ΁൓ө
12. API ఆٛͷࣗಈੜ੒
13. • APIͷୟ͖ํ͕Θ͔Βͳ͍ • APIఆٛͱϨεϙϯε͕߹ͬͯͳ͍ • ࠷৽ͷ࢓༷ʹ௥ैͯ͠ͳ͍ • OpenAPI(Swagger)ͷYAML͸ ਓྨ͕ॻ͘΋ͷ͡Όͳ͍ อक͕େม APIυΩϡϝϯτͷ೰Έ
14. Ͱ΋ FastAPIͳΒ…ʁ
15. /doc ΁ΞΫηε
16. OpenAPI ͷ࢓༷ॻ͕ࣗಈੜ੒ • ࢓༷ͱ࣮૷͕ৗʹಉظ ◦ લड़ͷ௨ΓܕνΣοΫ΋͋ΔͷͰ҆৺ • SwaggerUI ্ͰAPIୟ͍ͯಈ࡞֬ೝͰ͖Δ • ຊ൪؀ڥͰ͸ແޮԽ͢Δ͜ͱ΋Մೳ
17. ຊ౰ʹඞཁͩͬͨ΋ͷ
18. • router ʹΑΔ View ϑΝΠϧ෼ׂ • asyncio ʹΑΔඇಉظॲཧ • middleware Ͱڞ௨ͷॲཧΛ௥Ճ • Dependency ʹΑΔґଘ஫ೖ • 200 Ҏ֎ͷϨεϙϯεͷఆٛ ॻ͚ͳ͔ͬͨ͜ͱ ଓ͖͸ Web Ͱ(Ծ)
19. ThankYou!