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#Pydantic

Every article tagged Pydantic, in one place.

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16 Sep, 2026 last updated

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FastAPI 1 min read

Request Validation with Pydantic v2 in FastAPI

Pydantic models are the heart of FastAPI. Every field type and constraint becomes runtime validation and documentation. Field constraints from typing import Annotated from pydantic import BaseModel, EmailStr, Field class SignupRequest(BaseModel): email: EmailS...

16 Sep, 2026 Author 1.46K 73

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Python 1 min read

Python Dataclasses vs Pydantic: Which Should You Use?

Both give you classes with typed fields and less boilerplate. The key difference: dataclasses store data, Pydantic validates and converts it. Dataclasses from dataclasses import dataclass, field @dataclass(frozen=True, slots=True) class Money: amount: int # pa...

08 Aug, 2026 Author 680 123

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