Revolutionize Your Python Backend with FastAPI: How to Build API with Python

FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+. It is easy to use, powerful, and takes advantage of the latest Python features. In this article, we will explore how FastAPI can revolutionize your Python backend by building a simple API with Python.

Setting Up FastAPI

To get started with FastAPI, you will need to install it using pip. Open your terminal and run the following command:

		
			pip install fastapi
		
	

Once FastAPI is installed, you can create a new Python file for your API. In this example, we will create a file called main.py.

Creating Your API

Now that we have FastAPI installed, we can start building our API. First, we need to import the FastAPI class from the fastapi module:

		
			from fastapi import FastAPI

			app = FastAPI()
		
	

Next, we can define a simple endpoint for our API:

		
			@app.get("/")
			def read_root():
			    return {"Hello": "World"}
		
	

Running Your API

With our API endpoint defined, we can now run our Python file to start the API server. In your terminal, navigate to the directory where main.py is located and run the following command:

		
			uvicorn main:app --reload
		
	

Once the API server is running, you can navigate to http://localhost:8000 in your web browser to see the API response.

Conclusion

FastAPI is a powerful and modern web framework that makes building APIs with Python fast and easy. Its high performance and dependency injection capabilities set it apart from other Python web frameworks. By using FastAPI, you can revolutionize your Python backend and create robust and efficient API applications.