--- title: Go hands-on with Python 3.15 | daily.dev description: Python 3.15, due in fall 2026 and already available as a release candidate, brings lazy imports, the new Tachyon sampling profiler, an immutable frozendict... canonical: https://daily.dev/posts/go-hands-on-with-python-3-15-ntvozjefq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Go hands-on with Python 3.15 | daily.dev og:description: Python 3.15, due in fall 2026 and already available as a release candidate, brings lazy imports, the new Tachyon sampling profiler, an immutable frozendict... og:url: https://daily.dev/posts/go-hands-on-with-python-3-15-ntvozjefq og:image: https://api.daily.dev/og/posts/nTvozjEfQ.png og:image:alt: Go hands-on with Python 3.15 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Go hands-on with Python 3.15 **[InfoWorld](https://daily.dev/sources/infoworld)** · 3 min read · 0 upvotes · 0 comments ## Summary Python 3.15, due in fall 2026 and already available as a release candidate, brings lazy imports, the new Tachyon sampling profiler, an immutable frozendict type, and continued improvements to the built-in JIT compiler. Roundup also covers related ecosystem news: running Numba in the browser via WebAssembly, Mojo going open source under Apache 2, efforts to scale NumPy on free-threaded Python, and a security vulnerability found in Python's str.lower() method. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What new features does Python 3.15 add? Python 3.15, due in fall 2026 and already available as a release candidate, adds lazy imports that defer module execution until first use without requiring code changes, a new sampling profiler called Tachyon that inspects running code without instrumentation or restarts, an immutable frozendict type, and continued improvements to Python's built-in JIT compiler. _Track Python 3.15's rollout and what it means for your codebase with daily.dev._ ### What is Python's frozendict type used for? Frozendict is Python's new built-in immutable dictionary type, allowing a dictionary to be used as a key in another dictionary or sealed against further modification. It addresses a long-requested need for an immutable mapping type built directly into the language rather than relying on third-party workarounds. _Developers adopting new Python data types can follow frozendict coverage on daily.dev._ ### Is Mojo open source now? Mojo, the Python-challenging language for scientific computing built to resemble a 'Rust lite' language, is now freely available under an Apache 2 license, opening it up for tinkering and forking. It was previously positioned as a proprietary alternative aimed at high-performance numerical and AI workloads. _Evaluating Mojo against Python for performance-heavy work is easier tracked on daily.dev._ ## Similar posts on daily.dev - [Exciting Python features are on the way](https://daily.dev/posts/exciting-python-features-are-on-the-way-u7lhkabec) · InfoWorld · 0 upvotes · 0 comments --- Tags: [#python](https://daily.dev/tags/python), [#performance](https://daily.dev/tags/performance), [#numpy](https://daily.dev/tags/numpy), [#compiler-optimization](https://daily.dev/tags/compiler-optimization) [View this post on daily.dev](https://daily.dev/posts/go-hands-on-with-python-3-15-ntvozjefq) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Go hands-on with Python 3.15","url":"https://daily.dev/posts/go-hands-on-with-python-3-15-ntvozjefq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/go-hands-on-with-python-3-15-ntvozjefq"},"datePublished":"2026-08-21T09:05:25.084Z","dateModified":"2026-09-13T21:35:08.416Z","description":"Python 3.15, due in fall 2026 and already available as a release candidate, brings lazy imports, the new Tachyon sampling profiler, an immutable frozendict...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e49c30f266a12edd441b4447b70c38ce?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e49c30f266a12edd441b4447b70c38ce?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"InfoWorld","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"InfoWorld","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/bf6d68a999064029b0bb09aa6268f1f3","url":"https://daily.dev/sources/infoworld"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/go-hands-on-with-python-3-15-ntvozjefq","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"python,performance,numpy,compiler-optimization","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"InfoWorld","item":"https://daily.dev/sources/infoworld"},{"@type":"ListItem","position":3,"name":"Go hands-on with Python 3.15"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/go-hands-on-with-python-3-15-ntvozjefq#faq","mainEntity":[{"@type":"Question","name":"What new features does Python 3.15 add?","acceptedAnswer":{"@type":"Answer","text":"Python 3.15, due in fall 2026 and already available as a release candidate, adds lazy imports that defer module execution until first use without requiring code changes, a new sampling profiler called Tachyon that inspects running code without instrumentation or restarts, an immutable frozendict type, and continued improvements to Python's built-in JIT compiler. 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