combadge 0.2.1

Generic API client based on Pydantic

Combadge

Combadge generates a service client implementation from a user service interface declared by a protocol class or an abstract base class.

Features

• Request and response models based on pydantic
• Declarative services using Protocol
• Exception classes automatically derived from error models
• Built-in backends:
  • HTTPX – sync and async
  • Zeep – sync and async

Documentation

Sneak peek

from http import HTTPStatus
from typing import List

from httpx import Client
from pydantic import BaseModel, Field
from typing_extensions import Annotated, Protocol

from combadge.support.http.aliases import StatusCode
from combadge.support.http.markers import QueryParam, http_method, path
from combadge.support.httpx.backends.sync import HttpxBackend


# 1️⃣ Declare the response models:
class CurrentCondition(BaseModel):
    humidity: int
    temperature: Annotated[float, Field(alias="temp_C")]


class Weather(BaseModel):
    status: StatusCode[HTTPStatus]
    current: Annotated[List[CurrentCondition], Field(alias="current_condition")]


# 2️⃣ Declare the protocol:
class SupportsWttrIn(Protocol):
    @http_method("GET")
    @path("/{in_}")
    def get_weather(
        self,
        *,
        in_: str,
        format_: Annotated[str, QueryParam("format")] = "j1",
    ) -> Weather:
        raise NotImplementedError


# 3️⃣ Bind the service:
with HttpxBackend(Client(base_url="https://wttr.in"))[SupportsWttrIn] as service:
    # 🚀 Call the service:
    response = service.get_weather(in_="amsterdam")

assert response.status == HTTPStatus.OK
assert response.current[0].humidity == 71
assert response.current[0].temperature == 8.0