https://blog.gslin.org/archives/2026/03/10/12931/%e5%88%86%e6%9e%90%e8%bb%9f%e9%ab%94%e8%a4%87%e9%9b%9c%e5%ba%a6%e7%9a%84-cyclomatic-complexity/

分析軟體複雜度的 Cyclomatic complexity

#ci #complexity #computer #curl #cyclomatic #engineering #function #goodhart #law #programming #science #software

So I've created a #wily report for one thousand Black (the Python formatter) commits.

You can see that there was a huge (and complex), 7k lines __init__.py that got broken up around May 2021.

There's a trend of increasing LOC and complexity.

This report shows me there's a lot to improve in wily's code. Hopefully I'm back at that.

@hugovk @ambv

#Python #Black #formatter #CodeStyle #Cyclomatic #Complexity #Halstead #codequality #codemetrics

https://devdanzin.github.io/black/

Adding JSON support for #wily: now the results of diff, index, rank and report can be output as JSON.

If you can help with code review or tips on how to improve the output, I'm open to all suggestions.

Wily is a CLI application for tracking, reporting on complexity of Python code. It uses git to go through each revision and run complexity and code-analysis metrics over the code.

#python #Cyclomatic #Complexity #Halstead

https://github.com/tonybaloney/wily/pull/194

Mike Driscoll: Learning About Code Metrics in #Python with Radon

Nice introduction to #radon:

"""
You can use Radon to help you find complex code in your code base.
[...]
Here are the four commands that radon currently can use:

cc: compute #Cyclomatic #Complexity
raw: compute raw metrics
mi: compute #Maintainability Index
hal: compute #Halstead complexity metrics
[...]
"""

#codequality #codemetrics

https://www.blog.pythonlibrary.org/2023/09/20/learning-about-code-metrics-in-python-with-radon/

#radon calculates various metrics from #Python code, including Lines of Code (LOC) and number of comments for whole files.

For some other metrics, like #Cyclomatic #Complexity, it can also calculate values per function/method. So having LOC and other raw metrics for each function would be a nice new feature.

However, simple AST visitors don't work for that, as comments get lost when retrieving source code from AST with ast.get_source_segment().

1/n

#codequality

https://github.com/rubik/radon

At last, submitted a proposal for a #Python source code annotator for #wily, by @tonybaloney.

It allows inline visualization of code metrics in source code, inspired by @coveragepy

Uses #radon to calculate #Cyclomatic #Complexity and #Halstead metrics, then adds color coded metric values to a #Pygments highlighted source listing and allows changing the metrics for visualization.

The code works, there are screenshots and an example in the linked issue.

#codequality

https://github.com/tonybaloney/wily/issues/217

Today I wrote some trivial #python code to convert .gitignore rules to #radon exclude/ignore patterns. It turns out it was completely unnecessary for our project (#wily), because we already pass a tight list of targets for radon to scan.

But it might be useful for upstream radon users, as an option to gather exclude/ignore rules from .gitignore. So I'll propose that as a new feature and see how it goes.

#codequality #Cyclomatic #Complexity #Halstead #gitignore

https://github.com/rubik/radon

Proposed 2 simple PRs to #radon, adding class names to method names in Halstead reports. A third is in the works, adding line numbers to #Halstead metrics.

"Radon is a #Python tool that computes various metrics from the source code. Radon can compute:

#McCabe's complexity, i.e. #cyclomatic #complexity

raw metrics (these include SLOC, comment lines, blank lines, &c.)

Halstead metrics (all of them)

#Maintainability Index (the one used in Visual Studio)"

#codequality

https://github.com/rubik/radon

Working on a #Python source code annotator for #wily, which uses #radon to calculate #Cyclomatic #Complexity and #Halstead metrics. It adds metric values to a #Pygments highlighted source listing and allows changing the metrics for visualization.

Because radon doesn't record line numbers for Halstead metrics, we do a little song and dance to add them. Will probably offer a patch to include them upstream.

#codequality 🐍

https://devdanzin.github.io/wily/annotated_src.annotator.py.html

Some more #Python code quality visualization improvements for #wily: it's now possible to annotate source code with #Halstead metrics (#Cyclomatic #Complexity was already working) and select which one to display and use to color code blocks.

See a sample report here: https://devdanzin.github.io/wily/ (click the filenames for the annotated source code).

Code for the annotator currently lives at https://github.com/devdanzin/wily/tree/annotated_source, I hope to submit it for upstreaming soon-ish.

#CodeQuality