diwire

Type-driven dependency injection for Python. Zero dependencies. Zero boilerplate.

diwire is a dependency injection container for Python 3.10+ that builds your object graph from type hints alone. It supports scoped lifetimes, async-first resolution, generator-based cleanup, and open generics.

Installation

uv add diwire

pip install diwire

Quick start

Define your classes. Resolve the top-level one. diwire figures out the rest.

from dataclasses import dataclass

from diwire import Container, Lifetime


@dataclass
class Database:
    host: str = "localhost"


@dataclass
class UserRepository:
    db: Database


@dataclass
class UserService:
    repo: UserRepository


container = Container(autoregister_default_lifetime=Lifetime.TRANSIENT)
service = container.resolve(UserService)
print(service.repo.db.host)  # => localhost