Recommended Project Structure for a Python Web API
myproject/
│
├── pyproject.toml
├── uv.lock
├── README.md
├── .gitignore
├── .env # Environment variables (never commit in real projects)
│
├── src/
│ └── myproject/ # Main application package
│ ├── init.py
│
│ ├── api/ # API layer (Flask/FastAPI routers/controllers)
│ │ ├── init.py
│ │ ├── routes.py
│ │ └── middlewares.py
│
│ ├── core/ # Core utilities (config, logging, constants)
│ │ ├── init.py
│ │ ├── config.py
│ │ └── logger.py
│
│ ├── services/ # Business logic classes & service layers
│ │ ├── init.py
│ │ ├── translation_service.py
│ │ └── transcription_service.py
│
│ ├── models/ # Data models (Pydantic, schemas, DTOs)
│ │ ├── init.py
│ │ └── request_models.py
│
│ ├── data/ # Data assets used internally (optional)
│ │ ├── inputs/
│ │ └── outputs/
│ │
│ └── app.py # API entrypoint (e.g., Flask app or FastAPI app)
│
├── tests/
│ ├── init.py
│ ├── test_api.py
│ ├── test_translation_service.py
│ └── test_transcription_service.py
│
└── workflows/
└── ci.yml
Logical Layering (for clarity and testability)
Your project is structured in layers:
- API Layer (api/)
- Contains only routing, request parsing, and HTTP-related logic.
- Service Layer (services/)
- Business logic — these should be fully testable without running the API.
- Models Layer (models/)
- Schema validation (Pydantic), request/response structures.
- Core Layer (core/)
- Configuration, logging, environment handling.
- Data Layer (data/)
- Local files your script may need (audio, models, temp outputs).
- App Entrypoint (app.py)
- Creates and starts the API (similar to main()).
Recommended Project Structure for a Python Web API
myproject/
│
├── pyproject.toml
├── uv.lock
├── README.md
├── .gitignore
├── .env # Environment variables (never commit in real projects)
│
├── src/
│ └── myproject/ # Main application package
│ ├── init.py
│
│ ├── api/ # API layer (Flask/FastAPI routers/controllers)
│ │ ├── init.py
│ │ ├── routes.py
│ │ └── middlewares.py
│
│ ├── core/ # Core utilities (config, logging, constants)
│ │ ├── init.py
│ │ ├── config.py
│ │ └── logger.py
│
│ ├── services/ # Business logic classes & service layers
│ │ ├── init.py
│ │ ├── translation_service.py
│ │ └── transcription_service.py
│
│ ├── models/ # Data models (Pydantic, schemas, DTOs)
│ │ ├── init.py
│ │ └── request_models.py
│
│ ├── data/ # Data assets used internally (optional)
│ │ ├── inputs/
│ │ └── outputs/
│ │
│ └── app.py # API entrypoint (e.g., Flask app or FastAPI app)
│
├── tests/
│ ├── init.py
│ ├── test_api.py
│ ├── test_translation_service.py
│ └── test_transcription_service.py
│
└── workflows/
└── ci.yml
Logical Layering (for clarity and testability)
Your project is structured in layers: