Features

• Interface-based Dependency Injection: Use interfaces as references for dependencies, ensuring strong type safety.
• Mapped Dependencies: Register and resolve multiple implementations of the same interface by key. This allows you to map different behaviors or strategies to specific identifiers and retrieve them dynamically at runtime based on context.
• Singleton, Transient and Per Context Support: Easily configure lifetime scopes for your services.
• Easy to Extend: Open and flexible architecture.

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Getting Started

Installation

First, install Dipend in your project:

pip install dipend

Basic Usage

Here’s a simple example to show how Dipend works:

from dipend import DependencyContainer
from abc import ABC, abstractmethod

# Define an interface
class ILogger(ABC):
    @abstractmethod
    def info(self, message: str):
        pass

# Implement the interface
class Logger(ILogger):
  def info(self, message: str):
    print(f"INFO: {message}")


# Create a dependent class
class Greeter:
  def __init__(self, logger: ILogger):
    self._logger = logger

  def greet(self, name: str):
    message = f"Hello, {name}!"
    self._logger.info(message)
    return message


# Create the container
dependency_container = DependencyContainer()

# Register dependencies
dependency_container.add_singleton(ILogger, Logger)
dependency_container.add_transient(Greeter)

# Build singletons (optional if you want them ready immediately)
dependency_container.build_singletons()

# Resolve and use a dependency
greeter = dependency_container.get_dependency(Greeter)
result = greeter.greet("World")
print(result)

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More Examples

Looking for more use cases or advanced configurations?
Check out the full documentation.

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Why Dipend?

Dipend fully supports using interfaces as references for dependency resolution without needing extra boilerplate or manual token management.

This means you can register and retrieve implementations by their interfaces directly, preserving clean principles while keeping your code strongly typed and maintainable.

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Contributing

Contributions make the open-source community such an amazing place to learn, inspire, and create. We warmly welcome your contributions!

Before contributing, please read the following:

• CONTRIBUTING GUIDELINES
• CONTRIBUTOR LICENSE AGREEMENT

If you like the project, don't forget to give it a ⭐️!

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License

Copyright 2025 Saulo V. Alvarenga. All rights reserved.

Licensed under the Apache License, Version 2.0.

See LICENSE for complete license information.

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