dataclass-rest 0.2

An utility for writing simple clients for REST like APIs

Dataclass REST

A modern and simple way to create clients for REST like APIs

Quickstart

Step 1. Install

pip install dataclass_rest requests

Step 2. Declare models

@dataclass
class Todo:
    id: int
    user_id: int
    title: str
    completed: bool

Step 3. Create and configure client

from requests import Session
from dataclass_rest.http.requests import RequestsClient

class RealClient(RequestsClient):
    def __init__(self):
        super().__init__("https://example.com/api", Session())

Step 4. Declare methods using get/post/delete/patch/put decorators. Type hints are required. Body of method is ignored.

Use any method arguments to format URL. body argument is sent as request body with json. Other arguments, not used in URL are passed as query parameters. get and delete does not have body.

from typing import Optional, List
from requests import Session
from dataclass_rest import get, post, delete
from dataclass_rest.http.requests import RequestsClient

class RealClient(RequestsClient):
    def __init__(self):
        super().__init__("https://example.com/api", Session())

    @get("todos/{id}")
    def get_todo(self, id: str) -> Todo:
        pass

    @get("todos")
    def list_todos(self, user_id: Optional[int]) -> List[Todo]:
        pass

    @delete("todos/{id}")
    def delete_todo(self, id: int):
        pass

    @post("todos")
    def create_todo(self, body: Todo) -> Todo:
        """Создаем Todo"""

Asyncio

To use async client insted of sync:

1. Install aiohttp (instead of reuests)
2. Change dataclass_rest.http.requests.RequestsClient to dataclass_rest.http.aiohttp.AiohttpClient
3. Add async keyword to your methods

Configuring

• Override __init_request_body_factory, __init_request_args_factory and _init_response_body_factory to provide dataclass factory with required settings
  (see datacass_factory).
• You can use different body argument name if you want. Just pass body_name to the decorator.
• request_args_factory can be configured with scehmas for every argument type.
  They are awailable as methodspec.query_params_type of original method. E.g RealClient.get_todo.methodspec.query_params_type
• Custom error handlers can be set using @youemthod.on_error decorator in your class