What are the best practices for using Pydantic?

What are the best practices for using Pydantic?

When using Pydantic, it's best to define your models clearly, use type annotations, and leverage validators for data integrity.

Can you give an example of a Pydantic model?

Sure! Here's a simple example:

from pydantic import BaseModel

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

How can I validate email addresses in Pydantic?

You can use the EmailStr type from Pydantic to validate email addresses:

from pydantic import BaseModel, EmailStr

class User(BaseModel):
    email: EmailStr

What should I do if I need custom validation?

You can create custom validators using the @validator decorator. For example:

from pydantic import BaseModel, validator

class User(BaseModel):
    name: str

    @validator('name')
    def name_must_not_be_empty(cls, v):
        if not v:
            raise ValueError('Name must not be empty')
        return v