How do I force pytest to write color output?

Question

How do I force pytest to show the results in color, even when writing to a pipe? There does not seem to be any command line option to do so.

Johan Lübcke · Accepted Answer · 2016-04-22T07:02:41.150

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As of 2.5.0 py.test has the option --color=yes

As of 2.7.0, it should be also possible to do:

export PYTEST_ADDOPTS="--color=yes"

edited Apr 22 '16 at 07:02

answered Jun 27 '14 at 11:40

Johan Lübcke

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score 8 · Answer 2 · answered Nov 14 '13 at 19:43

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The "py" library that pytest uses will not use color if it doesn't detect a terminal. I ended up making a change to it to allow setting an enviroment variable (PY_FORCE_COLOR=1) to force the color.

I submitted a PR for this: https://bitbucket.org/hpk42/py/pull-request/10/add-an-environment-variable-py_force_color

For now, I install my fork to do this:

pip install hg+https://msabramo@bitbucket.org/msabramo/py@py_force_color

answered Nov 14 '13 at 19:43

Marc Abramowitz

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as said there, i think we should introduce a direct ``--color=yes|no|auto`` option to pytest. – hpk42 Nov 18 '13 at 09:53
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py.test now has the option that @hpk42 mentioned. – Marc Abramowitz Jan 26 '14 at 08:18

score 0 · Answer 3 · answered Apr 20 '22 at 20:05

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There's a library that I have not tried but sounds promising. It's pytest-rich. See: https://github.com/nicoddemus/pytest-rich

answered Apr 20 '22 at 20:05

astrochun

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How do I force pytest to write color output?

3 Answers3

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