3 posts tagged with "api"

📉 Drawbacks of Pydantic: A Deep Dive with Examples​

Pydantic is an indispensable tool in the modern Python ecosystem, powering frameworks like FastAPI and widely used for data validation. However, like any powerful abstraction, it comes with trade-offs. While it excels at validation and developer ergonomics, it introduces overhead and complexity that can become problematic in specific high-performance or dynamic scenarios.

This article explores the drawbacks of Pydantic, providing concrete code examples to illustrate where it might not be the best fit.

msgspec is gaining attention in the Python ecosystem due to its incredible speed and minimalist design. It's written in Rust, supports JSON and MsgPack, and uses type hints for validation. But like every tool, it’s not perfect - and when compared to the battle-tested and feature-rich Pydantic, there are several key trade-offs to be aware of.

In this article, we’ll explore what msgspec lacks compared to Pydantic, illustrated with code examples and practical reasoning.

As of 2025, Pydantic remains a cornerstone of data validation and serialization in the Python ecosystem. Yet, with the evolving needs of performance-critical applications and broader standardization efforts in the language, new contenders have emerged - and old ones are adapting.

In this article, we explore the current landscape of Python data serialization libraries, their strengths, weaknesses, and futures.