How Reladiff Works, t-strings, GIL and more

with some more interesting news, articles, packages and projects

Ashok Tankala

Jun 21, 2025

Registration for PyOhio 2025 is open!

Python 3.14.0 beta 3 is here!

This release, 3.14.0b3, is the third of four planned beta releases.

Articles

Building a Modern Python API with Azure Cosmos DB

Gwyneth Peña-Siguenza created a 5-part video series on building scalable Python APIs with FastAPI and Azure Cosmos DB. She covered key concepts like Pydantic models, FastAPI's dependency injection, async calls using azure.cosmos.aio, batch operations and centralised exception handling.

# Gwyneth Peña-Siguenza

How Reladiff Works

Pinpointing differences between two tables is very important for tasks like validating data migrations or spotting corruption. But when those tables live in different databases, it becomes tricky due to issues like network costs and different SQL dialects. In this article, Erez Shinnan shared how Reladiff tackles these challenges and its development journey.

# Erez Shinnan

Type hinting, type checking and data validation are often confusing words if someone uses them together, because they serve different purposes. In this video, Corey Schafer clearly explained the differences using a simple, practical example - it helps you understand what each term means, when to use them and how they work together in Python.

# Corey Schafer

t-strings are a new feature which is coming in Python 3.14. If you're wondering why we need t-strings when f-strings already exist, check out this video by Anthony Shaw. He explained how t-strings make it easier to create reusable templates and add custom logic or sanitisation, which makes string formatting more powerful and secure, with a clear and practical example.

# Anthony Shaw

Python is Removing GIL, Gradually

You've probably heard about the GIL vs no-GIL debate; it’s been happening for a while. If you’re not familiar with the full context, you should read this article by Yang Zhou. He explained what the GIL is, why it became a problem, what PEP 703 proposes, how to set up a no-GIL version of Python and what all of this means for Python developers. It's a great overview of a major topic in Python’s future.