a13x-depinj 0.2.0

A lightweight dependency injection framework for Python applications

a13x-depinj

A lightweight, yet powerful dependency injection framework for Python applications.

Features

• Simple and intuitive API
• YAML-based component configuration
• Lazy component initialization
• Automatic dependency management
• Component lifecycle management
• Type hints support
• Context manager interface

Installation

pip install a13x-depinj

Quick Start

1. Define your components:

from dataclasses import dataclass

@dataclass
class DatabaseConfig:
    url: str
    port: int

class Database:
    def __init__(self, config: dict):
        self.config = DatabaseConfig(**config)
        
    def connect(self):
        # Implementation
        pass

class UserService:
    def __init__(self, config: dict):
        self.db = ComponentRegistry().get(Database)

2. Create a deployment configuration (deployment.yaml):

components:
  - module: myapp.database
    class: Database
    config_path: database.config
  - module: myapp.services
    class: UserService
    config_path: services.user

where config_path references a starting entry in the config.yaml file:

services:
    user:
        name: "a13x"
        email: "[e-mail]"

database:
    config:
        db_path: "data/market_data.db"
        enable_wal: true
        pragma_synchronous: "NORMAL"
        pragma_journal_mode: "WAL"
        pragma_cache_size: -2000  # 2MB cache
        max_connections: 10

3. Initialize the registry:

from a13x_depinj import ComponentRegistry, Config

# Load application configuration
config = Config.load_config('config.yaml')

# Initialize components
with ComponentRegistry.from_yaml(config, 'deployment.yaml') as registry:
    # Get component instances
    db = registry.get(Database)
    user_service = registry.get(UserService)
    
    # Use components
    db.connect()

Advanced Usage

Lazy Initialization

Components can be initialized lazily when first accessed:

registry = ComponentRegistry.from_yaml(config, 'deployment.yaml', lazy=True)

Component Lifecycle Management

Components can implement cleanup methods:

class Database:
    def cleanup(self):
        # Cleanup resources
        pass

The registry will automatically call cleanup when using the context manager or when unregistering components.

Type Hints

The registry supports type hints for better IDE integration:

from typing import TypeVar, Type

T = TypeVar('T')
registry = ComponentRegistry[T]()
db: Database = registry.get(Database)

Contributing

Contributions are welcome! Please check our Contributing Guidelines for details.

License

This project is licensed under the MIT License - see the LICENSE file for details.