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<!DOCTYPE html>
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<meta name="author" content="Matt Makai">
<meta name="description" content="Code metrics provide insight into the quality of a code base via analysis tools. Learn more about code metrics on Full Stack Python.">
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<title>Code Metrics - Full Stack Python</title>
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<h1>Code Metrics</h1>
<p>Code metrics can be produced by static code analysis tools to determine
complexity and non-standard practices.</p>
<h2>Why are code metrics important?</h2>
<p>Code metrics allow developers to find problematic codebase areas that may
need refactoring. In addition, some metrics such as technical debt assist
developers in communicating to non-technical audiences why issues with a
system are occurring.</p>
<h2>Open source code metrics projects</h2>
<ul>
<li>
<p><a href="http://radon.readthedocs.org/en/latest/index.html">Radon</a> is a tool for
obtaining raw metrics on line counts, Cyclomatic Complexity, Halstead
metrics and maintainability metrics.</p>
</li>
<li>
<p><a href="http://www.pylint.org/">Pylint</a> contains checkers for PEP8 code
style compliance, design, exceptions and many other source code analysis
tools.</p>
</li>
<li>
<p><a href="https://pypi.python.org/pypi/pyflakes">PyFlakes</a> parses source files for
errors and reports on them.</p>
</li>
<li>
<p><a href="http://www.unixuser.org/~euske/python/pyntch/index.html">Pyntch</a> is a
static code analyzer that attempts to detect runtime errors. It does not
perform code style checking.</p>
</li>
</ul>
<h2>Hosted code metrics services</h2>
<ul>
<li>
<p><a href="https://landscape.io/">Landscape</a> provides free code metrics for open
source Python projects. Pricing is available for analyzing private
repositories as well.</p>
</li>
<li>
<p><a href="https://coveralls.io">Coveralls</a> shows code coverage from test suites
and other metrics to help developers improve the quality of their code.</p>
</li>
</ul>
<h2>Code metrics resources</h2>
<ul>
<li>
<p><a href="http://doughellmann.com/2008/03/01/static-code-analizers-for-python.html">Static Code Analizers for Python</a>
is an older article but goes over the basics of what Python static code
analyzers do.</p>
</li>
<li>
<p>This <a href="http://stackoverflow.com/questions/1428872/pylint-pychecker-or-pyflakes">Stack Overflow question on Python static code analysis tools</a>
contains comparison discussions of PyLint, PyChecker and PyFlakes.</p>
</li>
<li>
<p><a href="http://jbisbee.blogspot.ca/2014/04/getting-started-with-pylint.html">Getting Started with Pylint</a>
goes over setting up Pylint, generating the .pylintrc file and what's
in the configuration.</p>
</li>
<li>
<p>This /r/Python
<a href="https://www.reddit.com/r/Python/comments/3oyjva/what_python_linter_do_you_use_poll/">poll on what linters the community uses</a>
provides some input on using PyCharm just for its linting features as
well as some other approaches.</p>
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