I setup my project using PyScaffold and while running unit tests using pytest I get the following third party warning that I'd like to get rid of but don't know how:
==================================== warnings summary ====================================
c:\dev\pyrepo\lib\site-packages\patsy\constraint.py:13
c:\dev\pyrepo\lib\site-packages\patsy\constraint.py:13: DeprecationWarning: Using or importing
the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3,and in
3.9 it will stop working
from collections import Mapping
-- Docs: https://docs.pytest.org/en/latest/warnings.html
What's the best way to avoid warnings from third-party libraries like this but not my own project code warnings?
There are multiple ways to suppress warnings:
- using command-line arguments
To hide the warning completely use
pytest . -W ignore::DeprecationWarning
This command will hide warnings summary but will show 1 passed, 1 warning message
pytest . --disable-warnings
- creating
pytest.iniwith the following content
[pytest]
filterwarnings =
ignore::DeprecationWarning
You can also use regex patterns:
ignore:.*U.*mode is deprecated:DeprecationWarning
From the docs:
This will ignore all warnings of type DeprecationWarning where the start of the message matches the regular expression
.*U.*mode is deprecated.
marking your
test_function with@pytest.mark.filterwarnings("ignore::DeprecationWarning")using
PYTHONWARNINGSenvironment variable
PYTHONWARNINGS="ignore::DeprecationWarning" pytest .
It has the same syntax as the -W command-line arg. More here.
More details can be found in the pytest docs