What are some examples of Pydantic validation?

Can you give me some examples of how to use Pydantic for data validation?

Sure! Pydantic is a data validation and settings management library for Python. Here are a few examples.

What if I want to validate a list of items?

You can use the List type from Pydantic. For example:

from pydantic import BaseModel, conlist

class Item(BaseModel):
    name: str
    quantity: int

class Order(BaseModel):
    items: conlist(Item, min_items=1)

How do I handle optional fields in Pydantic?

You can use Optional from the typing module. For instance:

from typing import Optional

class User(BaseModel):
    name: str
    age: Optional[int] = None

Can Pydantic validate nested models?

Yes, Pydantic can validate nested models. You just need to define the nested model as a field in the parent model.