In the section "Increase Test Coverage" of the DevGuide : https://docs.python.org/devguide/_sources/coverage.txt

You can read this paragraph where there is a url for a website, but the website is out-of-date and don't reflect the right version of Python.

"""
Choosing what module you want to increase test coverage for can be done in a
couple of ways.
A third-party website at http://coverage.livinglogic.de/ provides an
overall view of how good coverage is for various modules (you will want to
focus on those in the ``Lib`` directory as those are the pure Python modules
from Python's stdlib, and thus easier to work with than the C extension
modules). But since this is a third-party site we cannot promise that it will
always be accessible or have useful information (i.e., be working properly).
"""


"""
Python code coverage
Generated at 2013-08-14 08:28:40

Last commit at 2013-08-14 03:34:49 by Raymond Hettinger

Changeset identification hash ac2f59a6637f0cc69c4a5541195ce752cf34952a

Local revision number 85168
"""

Two options, remove the link or update the site.

The cronjob that produces this information has been deactivated, because it currently produces broken output. The code for that job is available from here: https://pypi.python.org/pypi/pycoco

It would be great to have up to date coverage info for Python again, but I don't have time to work on that. Perhaps someone can combine this code and Ned Batchelder coverage script to implement a new coverage site (that includes coverage info for C modules).

However for now I think this link should be removed.

Ok thanks for your feedback about your script. Where can I find the scripts of Ned?

Thank you

I think Walter is referring to Ned's coverage.py project, i.e. the standard coverage module that you get with pip install coverage.

Here's a patch with a suggestion for the new text, with the part about the code coverage website removed.

Once that part was gone, I found the remainder slightly easier to read when the options were presented the other way around, so the simpler (although slower) option to run all the tests with coverage appears first. But I'm happy to change this (or anything else) if you feel that would be better.

Patch applies cleanly. The out of date link has been removed.
+1 ready for a core dev to merge.

New changeset 24536e980c9e by Ned Deily in branch 'default':
Issue #21400: Update the code coverage section to remove out-of-date
https://hg.python.org/devguide/rev/24536e980c9e

Done.  Thanks for the patch, Heather.  (By the way, if you plan to contribute more changes, please sign the PSF Contributor Form as described here:  https://docs.python.org/devguide/coredev.html#sign-a-contributor-agreement)

You're welcome! Thanks for the feedback, I've signed the PSF Contributor Form.

Thanks Heather for filing the PSF contribution form as well as the patch. I hope you will continue improving Python's documentation in the future :)