How can I use Pydantic for data validation in Python?

How can I use Pydantic for data validation in Python?

Pydantic is a data validation library that uses Python type annotations. You can define data models and validate data easily.

Can you show me a simple example of how to define a model?

Sure! Here's a basic example:

from pydantic import BaseModel

class User(BaseModel):
    id: int
    name: str
    email: str

This defines a User model with three fields.

How do I validate data against this model?

You can create an instance of the model with the data you want to validate. If the data is invalid, Pydantic will raise a validation error:

user = User(id=1, name='John Doe', email='[email protected]')

What happens if I provide invalid data?

If you provide invalid data, Pydantic will raise a ValidationError, detailing what went wrong.