TypeError: warn() takes at most 3 arguments (4 given), with pytest 3.9.2 #4243
Description
Since pytest 3.9.2, the following TypeError is raised from within pytest.warns():
/Users/maiera/virtualenvs/pywbem27/lib/python2.7/site-packages/_pytest/recwarn.py:172: TypeError
___________________________________ TestCreateConnection.test_namespace_slashes_set ____________________________________
self = <test_cim_operations.TestCreateConnection object at 0x11649ecd0>
def test_namespace_slashes_set(self): # pylint: disable=no-self-use
"""Test stripping of leading and trailing slashes in default namespace
of wbem connection when setting the attribute"""
conn = WBEMConnection('http://localhost', None,
default_namespace=None)
with pytest.warns(DeprecationWarning):
> conn.default_namespace = '//root/blah//'
testsuite/test_cim_operations.py:130:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
pywbem/cim_operations.py:740: in default_namespace
"deprecated", DeprecationWarning, 2)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
args = ('Setting the WBEMConnection.default_namespace property is deprecated', <type 'exceptions.DeprecationWarning'>, 2)
kwargs = {'stacklevel': 2}
f_globals = {'AUTO_GENERATE_SFCB_UEP_HEADER': True, 'CIMClass': <class 'pywbem.cim_obj.CIMClass'>, 'CIMClassName': <class 'pywbem.cim_obj.CIMClassName'>, 'CIMDateTime': <class 'pywbem.cim_types.CIMDateTime'>, ...}
def warn(*args, **kwargs):
kwargs.setdefault("stacklevel", 1)
kwargs["stacklevel"] += 1
# emulate resetting the warn registry
f_globals = sys._getframe(kwargs["stacklevel"] - 1).f_globals
if "__warningregistry__" in f_globals:
orig = f_globals["__warningregistry__"]
f_globals["__warningregistry__"] = None
try:
return self._saved_warn(*args, **kwargs)
finally:
f_globals["__warningregistry__"] = orig
else:
> return self._saved_warn(*args, **kwargs)
E TypeError: warn() takes at most 3 arguments (4 given)
/Users/maiera/virtualenvs/pywbem27/lib/python2.7/site-packages/_pytest/recwarn.py:172: TypeError
This is with all dependent Python packages being on the latest available package level, as of today.
When I reinstall pytest==3.9.1, the TypeError is not raised and the tests succeed as before.
We'll exclude pytest!=3.9.2 for the time being
- Include a detailed description of the bug or suggestion
see above -
pip listof the virtual environment you are using
Package Version Location
---------------------------------- ------------- --------------------------------
alabaster 0.7.12
astroid 1.6.5
atomicwrites 1.2.1
attrs 18.2.0
Babel 2.6.0
backports-abc 0.5
backports.functools-lru-cache 1.5
backports.shutil-get-terminal-size 1.0.0
bleach 3.0.2
certifi 2018.10.15
chardet 3.0.4
configparser 3.5.0
coverage 4.0.3
decorator 4.3.0
defusedxml 0.5.0
distro 1.3.0
docutils 0.14
entrypoints 0.2.3
enum34 1.1.6
flake8 3.6.0
funcsigs 1.0.2
functools32 3.2.3.post2
future 0.17.0
futures 3.2.0
gitdb2 2.0.5
GitPython 2.1.11
httpretty 0.9.5
idna 2.7
imagesize 1.1.0
ipaddress 1.0.22
ipykernel 4.10.0
ipython 5.8.0
ipython-genutils 0.2.0
ipywidgets 7.4.2
isort 4.3.4
Jinja2 2.10
jsonschema 2.6.0
jupyter 1.0.0
jupyter-client 5.2.3
jupyter-console 5.2.0
jupyter-core 4.4.0
lazy-object-proxy 1.3.1
linecache2 1.0.0
lxml 4.2.5
M2Crypto 0.30.1
MarkupSafe 1.0
mccabe 0.6.1
mistune 0.8.4
mock 2.0.0
more-itertools 4.3.0
nbconvert 5.4.0
nbformat 4.4.0
nose 1.3.7
notebook 5.7.0
numpy 1.13.3
packaging 18.0
pandocfilters 1.4.2
pathlib2 2.3.2
pbr 5.1.0
pexpect 4.6.0
pickleshare 0.7.5
pip 18.1
pkginfo 1.4.2
pluggy 0.8.0
ply 3.11
prometheus-client 0.4.2
prompt-toolkit 1.0.15
ptyprocess 0.6.0
py 1.5.2
pycodestyle 2.4.0
pyflakes 2.0.0
Pygments 2.2.0
pylint 1.9.3
pyparsing 2.2.2
pytest 3.9.2
pytest-cov 2.5.1
python-coveralls 2.9.1
python-dateutil 2.7.4
pytz 2018.6
pywbem 0.12.1.dev133 /home/travis/build/pywbem/pywbem
PyYAML 3.13
pyzmq 17.1.2
qtconsole 4.4.2
readme-renderer 23.0
requests 2.20.0
requests-toolbelt 0.8.0
scandir 1.9.0
Send2Trash 1.5.0
setuptools 40.4.3
simplegeneric 0.8.1
singledispatch 3.4.0.3
six 1.11.0
smmap2 2.0.5
snowballstemmer 1.2.1
Sphinx 1.8.1
sphinx-git 10.1.1
sphinxcontrib-websupport 1.1.0
terminado 0.8.1
testfixtures 5.4.0
testpath 0.4.2
tornado 4.5.3
tqdm 4.28.1
traceback2 1.4.0
traitlets 4.3.2
twine 1.12.1
typing 3.6.6
unittest2 1.1.0
urllib3 1.24
wcwidth 0.1.7
webencodings 0.5.1
wheel 0.32.2
widgetsnbextension 3.4.2
wrapt 1.10.11
yamlordereddictloader 0.4.0
- pytest and operating system versions
- MacOS High Sierra, but happens also on Ubuntu 16.04 (Travis) and Windows (Appveyor)
- Python 2.7.15 (on mac), Python 3.4 (on Travis)
- Minimal example if possible
The following is a simple version of the code that caused the TypeError to be raised, and I verified that it reproduces the issue with pytest==3.9.2 (and that it succeeds with pytest==3.9.1):
#!/usr/bin/env python
import pytest
import warnings
def issue_warning():
warnings.warn(
"Setting the xyz property is deprecated",
DeprecationWarning, 2)
def test_warn():
with pytest.warns(DeprecationWarning):
issue_warning()