baron

IDE allow you to refactor code, Baron allows you to write refactoring code.

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305GitHub stars

REPOSITORY AT A GLANCE

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What it is

IDE allow you to refactor code, Baron allows you to write refactoring code.

GitHub

Where it is used

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What people are saying

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This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year3 dated mentions

Observed mentions: 2017-02-12 22:27:52 UTC to 2022-01-07 20:34:59 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Comments
2017	2017-01-01 00:00:00 UTC	2018-01-01 00:00:00 UTC	2	2
2018	2018-01-01 00:00:00 UTC	2019-01-01 00:00:00 UTC	0	0
2019	2019-01-01 00:00:00 UTC	2020-01-01 00:00:00 UTC	0	0
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	0	0
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	0	0
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	1	1

What Hacker News says

3 sources

ehsankia·Jan 7, 2022

Nice! Internally we have a PCRE support on our code search and I regularly run a regex to find and fix these. I've also found a ton on opensource project which I've been trying to fix: https://github.com/YosysHQ/prjtrellis/pull/176 https://github.com/UWQuickstep/quickstep/pull/9 https://github.com/tensorflow/tensorflow/pull/51578 https://github.com/mono/mono/pull/21197 https://github.com/llvm/llvm-project/pull/335 https://github.com/PyCQA/baron/pull/156 https://github.com/dagwieers/pygments/pull/1 https://github.com/zhuyifei1999/guppy3/pull/12 https://github.com/pyusb/pyusb/pull/277 https://github.com/KhronosGroup/Vulkan-ValidationLayers/pull... It is indeed a very common mistake in Python, and can be very hard to debug. It bit me once and wasted a whole day for me, so I've been finding/fixing them ever since trying to save others the sam

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e pain I went through. EDIT: I will point out that I've found this error in other non-Python code too, such as c++ (see the 2nd PR for example). Here's the regex for anyone curious: [([{]\s*\n?(\s*['"](\w)+['"],\n)+(\s*['"]\w+['"]\n)(\s*['"]\w+['"],\n)*

In 5% of 666 Python repos had comma typo bugs (inc V8, TensorFlow and PyTorch)

w_t_payne·Aug 15, 2017

Yeah ... I've turned the parse tree output from Baron (https://github.com/PyCQA/baron) into HTML -- using span elements to represent the subtrees in the Baron AST. It was quite trivial (less than 200 lines including comments). I am now trying to see how I can add different representations to the rendered html output. I would like to show the abstract syntax tree, the data dependency graph, the control flow graph; the output of git blame; perhaps deltas over time; test coverage and various bits of requirements and test results traceability information alongside the code somehow. Lots of stuff. :-)

In Creating a visual map between code and its parse tree

brabram·Feb 12, 2017

Funny, I actually did the same thing for python years ago and also talked about "Lossless Syntax Tree" then start calling it a Full Syntax Tree since CST doesn't really fit; I wasn't aware of the existence of lib2to3 at that time. My goal was different than your: I wanted make writing custom refactoring code (that's it: code that modify source code) and code that works on source code a do-able task. I end up doing some design decisions that I haven't found elsewhere (but this field is hard to explore): - producing json, because datastructure doesn't lie to you and potential interoperability - nodes are responsible for the formatting within itself, in opposition with lib2to3 where a node is responsible for the formatting before itself (or after, I'm not sure anymore) - the tree is design for the human brain instead of an interpreter/compil

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er (for example having list instead of recursive structures) The project is called Baron https://github.com/pycqa/baron and was actually a mean for me to work on what really interest me: the abstraction that attempt to make writing custom refactoring a doable task https://github.com/pycqa/redbaron Good luck with your project :)

In From AST to Lossless Syntax Tree