In this article we want to learn about Flask vs FastAPI, Flask and FastAPI are two popular web frameworks in Python, these frameworks has its own strengths and weaknesses. Flask is lightweight and flexible framework that is easy to use and customize, but FastAPI is modern and high performance framework that offers different features. in this article we want to compare Flask and FastAPI and discuss their key differences.
Flask is micro web framework that is designed to be simple and easy to use. it is built on top of the Werkzeug WSGI library and the Jinja2 template engine. Flask is known for its flexibility and extensibility, and this is a popular choice for small to medium sized projects. the best feature of Flask is that it is simple, Flask has a small footprint and does not come with many pre built features, by this reason it is easy to learn and customize. Flask also has a large and active community, and there are many third party extensions that can be used to add functionality to the framework, also Flask has some limitations, for larger and more complex projects Flask may require more manual configuration and customization than other frameworks.
FastAPI is modern and high performance web framework that is designed for building APIs. it is built on top of the Starlette ASGI library and it uses Pydantic library for data validation and serialization. FastAPI has speed and it is easy to use, and it is a popular choice for high performance and data intensive applications, as i have already mentioned one of the key advantages of FastAPI is its speed, because this framework uses asynchronous programming and type annotations to generate fast and efficient code. FastAPI also comes with many built in features, such as automatic data validation and automatic documentation generation, and this saves developers time and effort, even though FastAPI has speed and also it is easy, but this framework can be more difficult to learn and customize than other frameworks, especially for developers who are new to asynchronous programming and type annotations. FastAPI also has smaller community than Flask, it means that there are fewer third party extensions available.
Flask vs FastAPI
Flask and FastAPI have several key differences that developers should consider when choosing a framework for their project. Flask is lightweight and flexible framework, it is easy to use and you can easily customize that, but it lacks some features that are commonly found in other frameworks. FastAPI is modern and high performance framework that offers many built in features, but it can be more difficult to learn and customize.
If you see the performance, FastAPI is faster than Flask, because it uses asynchronous programming and type annotations, but Flask can still be a good choice for small to medium sized projects that do not require high performance.