PythonBoot

PythonBoot is a FastAPI-based backend framework with a Spring Boot-inspired programming model. It keeps FastAPI intact and adds component scanning, an application-scoped IoC container, injection, lifecycle management, AOP, transaction abstractions, task execution, and auto-configuration.

Minimal application

from pythonboot_web import PythonBootApplication, pythonboot_application

@pythonboot_application
class Application(PythonBootApplication):
    pass

app = Application().app

The application class package is scanned recursively by default. The container starts and stops in ASGI lifespan.

• Python >= 3.12; the core depends on Pydantic, pydantic-settings, PyYAML, and wrapt. The Web Starter adds FastAPI and Uvicorn.
• Controllers are classes marked with @controller; FastAPI parameters, dependencies and response models remain native.
• Every bean belongs to an application instance. A bean cannot be obtained from an inactive container.
• application.yml and profile-specific YAML files supply configuration.

Continue with Application and scanning, or read the PythonBoot / Spring Boot comparison.

Install Web applications with uv add pythonboot-starter-web. See Web Starter and implementation package for package boundaries and import migration.