... fastapi.

FastApi is an enjoyable tool for building web applications in python. In these videos we demonstrate the main features.


You can send json to FastApi. This is like sending a python dictionary. You'd still like the dictionary you send to adhere to a standard though. FastApi using the pydantic library to help you define the perfect json type.

The app.py file at the end of our video looks like this;

from fastapi import FastAPI

app = FastAPI()

def root():
    return {"message": "hello world again"}

def read_user(user_id: str):
    return {"user_id": user_id}

from pydantic import BaseModel, validator

class Item(BaseModel):
    name: str
    price: float

    def price_must_be_positive(cls, value):
        if value <= 0: 
            raise ValueError(f"we expect price >= 0, we received {value}")
        return value

def create_item(item: Item):
    return item

Don't forget that you need to import the validator decorator from pydantic.

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