Dependency declarations for Python frameworks and tools.

Documentation: https://depende.tiangolo.com

Source Code: https://github.com/tiangolo/depende

depende provides small dependency declarations in the style of FastAPI for reuse by frameworks and tools.

uv add depende

Or if using pip:

pip install depende

from depende import Depends, DependsInfo

Depends(...) returns a frozen DependsInfo metadata object with:

• dependency: a callable dependency, or None
• use_cache: whether a framework may reuse the dependency result within its active solving context
• scope: an opaque framework-defined string, or None

The package only declares dependency metadata. It does not solve, execute, cache, inject request data, manage lifecycles, generate OpenAPI, or define framework-specific scopes.

from depende import Depends
from typing import Annotated


def get_settings() -> dict[str, str]:
    return {"mode": "prod"}


SettingsDep = Annotated[dict[str, str], Depends(get_settings, scope="command")]

Frameworks decide what scope means and how dependency solving works.

This project is licensed under the terms of the MIT license.