Generate a Python Framework for E-commerce

Create a high-level outline for a Python framework that covers the essential features for building e-commerce applications. The framework should include a modular architecture, user authentication and authorization, payment gateways, order management, and inventory tracking. Incorporate existing libraries and frameworks to reduce development time. Provide a step-by-step guide on setting up the framework, including dependencies, configuration, and best practices. Include examples of how to integrate with popular e-commerce APIs and payment gateways. Assume the reader has a basic understanding of Python and web development. Output should be a high-level outline and a Python code snippet.