Python

Python conventions are defined by PEP 8. Follow it.

Casing Rules

Element	Convention	Example
Classes	PascalCase	OrderService, UserRepository
Functions / methods	snake_case	get_user_by_id, process_payment
Variables	snake_case	user_count, is_active
Module-level constants	SCREAMING_SNAKE_CASE	MAX_RETRY_COUNT, DEFAULT_TIMEOUT
Private members	_snake_case prefix	_connection, _validate_input
"Dunder" methods	__snake_case__	__init__, __repr__
Modules / packages	snake_case	order_service, user_repository

File Naming

# Modules match their primary class or purpose (snake_case):
order_service.py
user_repository.py
payment_processor.py

# Tests mirror the source file:
test_order_service.py
test_user_repository.py

Package Structure

src/
└── {package_name}/
    ├── __init__.py
    ├── models/
    ├── services/
    ├── repositories/
    └── utils/
tests/
    ├── unit/
    └── integration/