Code Metrics in Python
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)
Radon will run from Python 2.6 to Python 3.4 with a single code base and without the need of tools like 2to3 or six. It can also run on PyPy without any problems (currently only PyPy 2.0.0 is tested).
Radon depends on as few packages as possible. Currently only
strictly required (for the CLI interface).
colorama is also listed as a
dependency but if Radon cannot import it, the output simply will not be
$ pip install radon
Or download the source and run the setup file:
$ python setup.py install
Radon can be used either from the command line or programmatically. Documentation is at https://radon.readthedocs.org/.
Cyclomatic Complexity Example
$ radon cc -anc ../baker/baker.py ../baker/baker.py M 581:4 Baker.parse_args - D M 723:4 Baker.parse - D M 223:4 Baker.command - C M 796:4 Baker.apply - C M 857:4 Baker.run - C 32 blocks (classes, functions, methods) analyzed. Average complexity: B (6.15625)
- cc is the radon command
- -a tells radon to calculate the average complexity at the end
- -nc tells radon to print only results with a complexity rank of C or worse. Other examples: -na (from A to F), or -nd (from D to F).
Actually it’s even better: it’s got colors!
On a Continuous Integration server
If you are looking to use
radon on a CI server you may be better off with
xenon. Although still experimental, it will
fail (that means exiting with a non-zero exit code) when various thresholds are
radon is more of a reporting tool, while
xenon is a monitoring
Release history Release notifications
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
|Filename, size & hash SHA256 hash help||File type||Python version||Upload date|
|radon-0.5.2-py2.py3-none-any.whl (31.7 kB) Copy SHA256 hash SHA256||Wheel||3.4||Jul 24, 2014|
|radon-0.5.2.tar.gz (189.4 kB) Copy SHA256 hash SHA256||Source||None||Jul 24, 2014|