FastAPI web application featuring Poetry, Pydantic V2, APIRouter, CRUD. Video 1

FastAPI is a modern web framework for building APIs with Python. It is easy to use, fast, and asynchronous, making it a great choice for developing web applications. In this tutorial, we will create a web application using FastAPI, Poetry, Pydantic V2, and APIRouter to implement CRUD operations.

To get started, make sure you have Python installed on your system. You can download and install Python from the official website. We will also be using Poetry as the package manager for our project. To install Poetry, run the following command in your terminal:

curl -sSL https://install.python-poetry.org | python3

Once Poetry is installed, create a new project directory and navigate to it in your terminal. Then, run the following command to create a new Poetry project:

poetry new fastapi-crud

This will create a new directory with the name fastapi-crud containing the basic structure of a Python project. Navigate to the newly created directory and then add FastAPI and Pydantic V2 as dependencies to your project by running the following commands:

poetry add fastapi pydantic==1.8

Next, we will create a new Python file called main.py in the fastapi-crud directory. In this file, we will define our FastAPI application and set up our API routes using APIRouter. Here is an example of what the main.py file might look like:

from fastapi import FastAPI, APIRouter
from pydantic import BaseModel

app = FastAPI()

router = APIRouter()

class Item(BaseModel):
    name: str
    description: str

items = []

@router.get("/items")
async def get_items():
    return items

@router.post("/items")
async def create_item(item: Item):
    items.append(item.dict())
    return item

app.include_router(router)

In this example, we defined a simple FastAPI application with two API routes: one for getting all items and one for creating a new item. We also defined a Pydantic model called Item to represent our items with name and description fields.

To run our FastAPI application, we need to start the uvicorn server. First, install uvicorn by running the following command:

poetry add uvicorn

Then, start the uvicorn server with the following command:

poetry run uvicorn main:app --reload

This will start the uvicorn server and run our FastAPI application. You can now access your API endpoints by navigating to http://127.0.0.1:8000 in your web browser.

In this tutorial, we covered the basics of creating a web application with FastAPI, Poetry, Pydantic V2, and APIRouter. This is just a starting point, and there is much more you can do with FastAPI to build powerful and efficient web applications. I recommend exploring the FastAPI documentation to learn more about the features and capabilities of this amazing web framework.