A simple API framework based on Flask.
Flask OpenAPI is a simple web API framework based on Flask. It uses Pydantic to verify data and automatic generation of interaction documentation.
The key features are:
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Easy to code: Easy to use and easy to learn
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Standard document specification: Based on OpenAPI Specification
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Interactive OpenAPI documentation: Swagger, Redoc, RapiDoc, RapiPdf, Scalar, Elements
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Data validation: Fast data verification based on Pydantic
Python 3.11+
flask-openapi is dependent on the following libraries:
pip install -U flask-openapi[swagger]
Optional dependencies
- python-email-validator supports email verification.
- python-dotenv enables support
for Environment Variables From dotenv when running
flaskcommands. - pyyaml is used to output the OpenAPI document in yaml format.
- asgiref allows views to be defined with
async defand useawait. - flask-openapi-plugins Provide OpenAPI UI for flask-openapi.
To install these dependencies with flask-openapi:
pip install flask-openapi[yaml] # or pip install flask-openapi[async] # or pip install flask-openapi[dotenv] # or pip install flask-openapi[email] # or all pip install flask-openapi[yaml,async,dotenv,email] # or manually pip install pyyaml asgiref python-dotenv email-validator # OpenAPI UI plugins pip install -U flask-openapi[swagger,redoc,rapidoc,rapipdf,scalar,elements]
Here's a simple example, further go to the Example.
from pydantic import BaseModel from flask_openapi import Info, Tag from flask_openapi import OpenAPI info = Info(title="book API", version="1.0.0") app = OpenAPI(__name__, info=info) book_tag = Tag(name="book", description="Some Book") class BookQuery(BaseModel): age: int author: str @app.get("/book", summary="get books", tags=[book_tag]) def get_book(query: BookQuery): """ to get all books """ return { "code": 0, "message": "ok", "data": [ {"bid": 1, "age": query.age, "author": query.author}, {"bid": 2, "age": query.age, "author": query.author} ] } if __name__ == "__main__": app.run(debug=True)
Class-based API View Example
from pydantic import BaseModel, Field from flask_openapi import OpenAPI, Tag, Info, APIView info = Info(title="book API", version="1.0.0") app = OpenAPI(__name__, info=info) api_view = APIView(url_prefix="/api/v1", view_tags=[Tag(name="book")]) class BookPath(BaseModel): id: int = Field(..., description="book ID") class BookQuery(BaseModel): age: int | None = Field(None, description="Age") class BookBody(BaseModel): age: int | None = Field(..., ge=2, le=4, description="Age") author: str = Field(None, min_length=2, max_length=4, description="Author") @api_view.route("/book") class BookListAPIView: a = 1 @api_view.doc(summary="get book list") def get(self, query: BookQuery): print(self.a) return query.model_dump_json() @api_view.doc(summary="create book") def post(self, body: BookBody): """description for a created book""" return body.model_dump_json() @api_view.route("/book/<id>") class BookAPIView: @api_view.doc(summary="get book") def get(self, path: BookPath): print(path) return "get" @api_view.doc(summary="update book") def put(self, path: BookPath): print(path) return "put" @api_view.doc(summary="delete book", deprecated=True) def delete(self, path: BookPath): print(path) return "delete" app.register_api_view(api_view) if __name__ == "__main__": app.run(debug=True)
Run the simple example, and go to http://127.0.0.1:5000/openapi.
OpenAPI UI plugins are optional dependencies that require manual installation.
pip install -U flask-openapi[swagger,redoc,rapidoc,rapipdf,scalar,elements]More optional ui templates goto the document about UI_Templates.
