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Description:

puffpastry 0.0.3

:bread: puffpastry
A lightweight, intuitive, Pythonic dependency injection framework.
Highlights:

:mushroom: Micro framework with very little overhead - single file implementation and handful of public API methods, minimal third-party package requirements.
:full_moon: Unit-tests cover all core functionality, ruff and pre-commit used to ensure codebase health.
:snake: Compliant with latest Python 3.x version

Getting Started
To install from PyPI, use pip:
pip install puffpastry

The following example shows bootstrapping a webapp using fastapi with configuration read from environment (or from .env file, as we use python-dotenv under the hood). Of course, for such a minimal one-file implementation, dependency injection seems superfluous; but for larger codebases spread across multiple files this is a great way to manage dependencies and configuration.
from fastapi import FastAPI
from puffpastry import create, provides
from requests import get

class IpifyClient:
def __init__(self, base_url):
self.base_url = base_url

def ipv4(self):
return get(self.base_url).content.decode("utf8")

@provides("fastapi")
def fastapi_provider(app):
return FastAPI()

@provides("ipify_client")
def ipify_client(app):
# The base url will be read from IPIFY_BASE_URL env variable or .env file.
# To run this example set this value to 'https://api.ipify.org'
return IpifyClient(base_url=app.config.ipify_base_url)

@provides("home_route")
def home_route_provider(app):
@app.fastapi.get("/")
def home():
public_ip = app.ipify_client.ipv4()

return {"message": f"your public IP is {public_ip}"}

def create_app():
return create("my_app").load("fastapi", "ipify_client", "home_route")

app = create_app().fastapi

you can run this example with the fastapi CLI, assuming you saved the file as app.py:
fastapi dev app.py

See examples/ for more usage examples.