FastAPI vs Django/Flask

Django and Flask are two of the most popular Python web frameworks, but they serve different purposes and have different features. This difference could indeed reflect the difference between WSGI and ASGI, as Django has moved to ASGI support while Flask is still primarily based on WSGI (although Flask can be extended with additional libraries to support ASGI ).

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Main differences

方面	Django	Flask
理念	“包含电池”：几乎包含所有内置工具（例如，ORM、管理面板）。	极简和轻量级：让您控制选择库和工具。
用例	非常适合需要预定义结构的**大型复杂应用程序**。	非常适合灵活至关重要的**小型到中型项目**。
同步与异步	支持WSGI和ASGI，在新版本中支持异步编程。	主要基于WSGI，但可以添加异步支持（例如，使用Quart或扩展）。
学习曲线	由于包含许多预构建功能和约定，因此学习曲线较陡峭。	由于其简单性和最小结构，因此更容易学习。
内置功能	开箱即用地提供ORM、管理界面、身份验证和表单。	不提供这些功能；您可以根据需要添加它们。
可扩展性	使用内置工具进行大规模开发，更适合**企业级可扩展应用程序**。	可扩展，但需要更多努力才能集成用于高级用例的库。
社区和生态系统	大型社区，大量可重用应用程序和插件。	活跃的社区，拥有针对特定用例的库。
性能	由于其全面性，因此略重。	对于小型应用程序，轻量级且速度更快。

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When to choose Django

1. Complex Applications:

   • If you need features like ORM, admin panel or built-in user authentication.
   • For example: e-commerce platform, enterprise system or multi-user platform.

2. Consistency:

   • Django enforces a consistent project structure, making collaboration easier in large teams.

3. Asynchronous functions :

   • New versions of Django support ASGI, making it suitable for both synchronous and asynchronous tasks.

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When to choose Flask

1. Small/Medium Projects:

   • For small applications or APIs, you want flexibility without unnecessary overhead.
   • Examples: microservices, single-function applications.

2. Customized :

   • If you prefer to choose your own tools (e.g. database library, template engine) instead of relying on built-in tools.

3. Performance of Small Applications:

   • Flask is lightweight and faster for applications with fewer dependencies.

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Conclusion

• For large and complex applications that need built-in features to save time and effort, use Django.
• For small, simple projects that require control and flexibility, use Flask. Both frameworks are powerful, but the choice depends on your project size, complexity, and need for asynchronous support.

Look now:

ASGI and WSGI

ASGI (Asynchronous Server Gateway Interface) and WSGI (Web Server Gateway Interface) are both interfaces between web servers and Python web applications, but their design goals and architecture are different.

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WSGI (Web Server Gateway Interface)

1. Purpose:

   • Synchronization Standard interface for Python web applications.
   • Designed to handle HTTP requests in a blocking manner.

2. Use Case:

   • Works with synchronization frameworks like Flask and Django (legacy version).
   • Works well for simple, I/O bound applications with predictable request-response cycles.

3. Limitations:

   • Cannot natively handle asynchronous programming.
   • Not suitable for modern applications requiring WebSockets or high concurrency processing.

4. Example Architecture:

<code>   客户端 → Web服务器（例如，Gunicorn）→ WSGI应用程序</code>

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ASGI (Asynchronous Server Gateway Interface)

1. Purpose:

   • AsynchronousThe next generation standard for Python web applications.
   • Designed to support asynchronous programming, WebSockets and long-lived connections.

2. Use Case:

   • It is suitable for asynchronous framework like Fastapi, Django (with ASGI support) and Starlette.
   • Handle synchronization and asynchronous requests to improve flexibility.

3. advantages :

   Native support Async/Await
   • . You can handle WebSockets
   ,
   • HTTP/2 and other modern protocols. It is more suitable for applications with high -composite or real -time functions.
   Example architecture
:
Main differences

<code>   客户端 → Web服务器（例如，Gunicorn）→ WSGI应用程序</code>

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When will it be used?

方面	WSGI	ASGI
并发	同步（阻塞I/O）。	异步（非阻塞I/O）。
现代功能	不支持WebSockets或HTTP/2。	支持WebSockets、HTTP/2和长期连接。
框架	Flask、旧版Django版本、Pyramid。	FastAPI、Starlette、具有ASGI的新版Django版本。
性能	由于阻塞特性，可扩展性有限。	对于高并发应用程序具有更好的性能。
用例	简单的同步Web应用程序。	实时应用程序、WebSockets和异步应用程序。

WSGI

:

If you are using traditional synchronous frameworks (for example, Flask, old version of Django).

• It is suitable for simple APIs or websites that do not need asynchronous functions.

  • asgi
  :
  If you are building a real -time application, you need websock support, or you need to process many connections at the same time.
• For modern frameworks, such as Fastapi, or asynchronous functions for expanding Django.
  • Conclusion
  • WSGI
  It is very suitable for traditional synchronous web applications.
ASGI

is the modern standard of asynchronous applications, which aims to efficiently handle complex and real -time use cases.

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