---
title: "Python 3.15 Hits Feature Freeze and Other News for June 2026 – Real Python"
url: https://daily.dev/posts/python-3-15-hits-feature-freeze-and-other-news-for-june-2026-real-python-doxhua30e
source_url: https://realpython.com/python-news-june-2026
type: article
source: "Real Python"
published: 2026-06-08T14:09:25.451Z
updated: 2026-08-24T06:53:31.758Z
tags: ["python", "ai-agents", "pydantic", "cpython"]
reading_time: 16
upvotes: 1
comments: 0
language: en
---

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# Python 3.15 Hits Feature Freeze and Other News for June 2026 – Real Python

**[Real Python](https://daily.dev/sources/rpython)** · 16 min read · 1 upvotes · 0 comments

## Summary

Python 3.15 hit beta 1 feature freeze on May 7, locking in a final feature set that includes a new built-in `sentinel` (PEP 661), `frozendict`, explicit lazy imports, unpacking in comprehensions, UTF-8 as default encoding, a stable free-threaded ABI, and a new sampling profiler. The JIT compiler also improved 8–9% on x86-64. PEP 829 was accepted, deprecating code-execution via `.pth` files in favor of explicit `.start` startup files. Pydantic forked `httpx` as `httpx2` after the original stalled, with community coordination rather than conflict. Meta's Rust-based type checker Pyrefly reached 1.0, already used by Instagram, PyTorch, and NumPy. AI bug-hunting efforts using Claude Code agents found 575+ bugs in Python C extensions and 271 in Firefox. Anthropic's Code with Claude event highlighted multi-agent orchestration and the Advisor pattern for cost-efficient AI workflows. Other releases include Django 6.1 alpha, pip 26.1, PyPy 7.3.22, Pydantic AI v2 beta, and PyTorch 2.12.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://realpython.com/python-news-june-2026>

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Tags: [#python](https://daily.dev/tags/python), [#ai-agents](https://daily.dev/tags/ai-agents), [#pydantic](https://daily.dev/tags/pydantic), [#cpython](https://daily.dev/tags/cpython)

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