'No handlers could be found for logger "root"' error message, py2.7

[asottile]

In GitLab by @jwhitlock on Mar 9, 2015, 07:14

$ flake8 --version
2.3.0 (pep8: 1.6.2, pyflakes: 0.8.1, pep257: 0.2.1.post1, mccabe: 0.3) CPython 2.7.8 on Darwin
$ flake8 .
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
$ flake8 -j 0
No handlers could be found for logger "root"
$ flake8 -j 1
No handlers could be found for logger "root"
$ flake8 -j 2
No handlers could be found for logger "root"
No handlers could be found for logger "root"

I suspect this is a multiprocessing / logging interaction, since it varies with the number of jobs selected. It also goes away in Python 3.4.2:

$ flake8 --version
2.3.0 (pep8: 1.6.2, pyflakes: 0.8.1, pep257: 0.2.1.post1, mccabe: 0.3) CPython 3.4.2 on Darwin
$ flake8 .
$ flake8 -j 2 .

[asottile]

In GitLab by @jwhitlock on Mar 9, 2015, 07:20

Still there w/ flake8 2.4.0:

$ flake8 --version
2.4.0 (pep8: 1.5.7, pyflakes: 0.8.1, pep257: 0.2.1.post1, mccabe: 0.3) CPython 2.7.8 on Darwin
$ flake8 .
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
No handlers could be found for logger "root"
$ flake8 -j 2 .
No handlers could be found for logger "root"
No handlers could be found for logger "root"

And, still not there with flake8 2.4.0 and Python 3.4:

$ flake8 --version
2.4.0 (pep8: 1.5.7, pyflakes: 0.8.1, pep257: 0.2.1.post1, mccabe: 0.3) CPython 3.4.2 on Darwin
$ flake8 .

[asottile]

In GitLab by @sigmavirus24 on Mar 9, 2015, 07:46

I think this might be a problem with pep257 which is the only library that uses logging since none of (flake8, pep8, pyflakes, mccabe) use logging. And I already forgot there was an issue for it here.

I'll see if I can bug the pep257 maintainers for a release. Once there is you should be able to update that since there's no version requirement in flake8-docstrings.