Welcome to FastAPI

FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints.

To create your first “Hello World” application with FastAPI, you can follow these simple steps:

1. Install FastAPI using pip:

pip install fastapi

2. Install uvicorn, a lightweight ASGI server implementation, to run the FastAPI application:

pip install uvicorn

3. Create a new Python file, for example, app.py, and add the following code:

from fastapi import FastAPI

app = FastAPI()

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

4. Run the FastAPI application using uvicorn:

uvicorn app:app --reload

5. Open your web browser and navigate to http://localhost:8000/ to see the “Hello, World!” message.

Congratulations! You have successfully created your first “Hello World” API with FastAPI.

FastAPI’s simplicity, speed, and type checking features make it a powerful framework for building web APIs. You can explore more features and functionalities of FastAPI by referring to its official documentation.