Pait(π tool) - Python Modern API Tools, easier to use web frameworks/write API routing

Documentation: https://so1n.me/pait/

中文文档: https://so1n.me/pait-zh-doc/

Pait is an api tool that can be used in any python web framework, the features provided are as follows:

• Integrate into the Type Hints ecosystem to provide a safe and efficient API interface coding method.
• Automatic verification and type conversion of request parameters (depends on Pydantic and inspect, currently supports Pydantic V1 and V2 versions).
• Automatically generate openapi files and support UI components such as Swagger,Redoc,RapiDoc and Elements.
• TestClient support, response result verification of test cases。
• Plugin expansion, such as parameter relationship dependency verification, Mock response, etc.。
• gRPC GateWay (After version 1.0, this feature has been migrated to grpc-gateway)
• Automated API testing
• WebSocket support
• SSE support

Note:

• mypy check 100%

• python version >= 3.8 (support postponed annotations)

pip install pait

from typing import Type
import uvicorn  # type: ignore
from starlette.applications import Starlette
from starlette.responses import JSONResponse
from starlette.routing import Route

from pait.app.starlette import pait
from pait.field import Body
from pait.openapi.doc_route import add_doc_route
from pait.model.response import JsonResponseModel
from pydantic import BaseModel, Field


class DemoResponseModel(JsonResponseModel):
    """demo post api response model"""
    class ResponseModel(BaseModel):
        uid: int = Field()
        user_name: str = Field()

    description: str = "demo response"
    response_data: Type[BaseModel] = ResponseModel


@pait(response_model_list=[DemoResponseModel])
async def demo_post(
    uid: int = Body.i(description="user id", gt=10, lt=1000),
    user_name: str = Body.i(description="user name", min_length=2, max_length=4)
) -> JSONResponse:
    return JSONResponse({'uid': uid, 'user_name': user_name})


app = Starlette(routes=[Route('/api', demo_post, methods=['POST'])])
add_doc_route(app)
uvicorn.run(app)

See documentation for more features

If the web framework is not supported(which you are using).

Can be modified sync web framework according to pait.app.flask

Can be modified async web framework according to pait.app.starlette

The main operating principle of Pait is to convert the function signature of the route function into Pydantic Model through the reflection mechanism when the program is started, and then verify and convert the request parameters through Pydantic Model when the request hits the route.

These two stages are all automatically handled internally by Pait. The first stage only slightly increases the startup time of the program, while the second stage increases the response time of the routing, but it only consumes 0.00005(s) more than manual processing. The specific benchmark data and subsequent optimization are described in #27.

For more complete examples, please refer to example