Runtime error when running pytest with PyQt5 application

[mandeep]

Having a problem running pytest with a PyQt5 application. When running this command: py.test tests.py, I receive an error saying:

tests.py:3: in <module>
    import application
application.py:3: in <module>
    from PyQt5.QtGui import QIcon
E   RuntimeError: the PyQt5.QtCore and PyQt4.QtCore modules both wrap the QObject class

I'm not sure if this is an error with pytest or pytest-qt. The code in tests.py is as follows:

import os
import sys
import application
import pytest
from PyQt5.QtGui import QIcon
from PyQt5.QtPrintSupport import QPrintDialog
from PyQt5.QtWidgets import (QMainWindow, QApplication, QTextEdit, QAction,
                             QFileDialog, QFontDialog, QMessageBox, QInputDialog)


`
    class Test:

        def setup_method(self):
            app = QApplication(sys.argv)
            wind = application.TextEditor()
            wind.show()
            sys.exit(app.exec_())

Here is a conda list of the conda env. I do not have PyQt4 installed nor am I importing it anywhere:

# packages in environment at /home/mandeep/anaconda3:
#
_license                  1.1                      py35_1  
abstract-rendering        0.5.1               np110py35_0  
alabaster                 0.7.7                    py35_0  
anaconda                  2.5.0               np110py35_0  
anaconda-client           1.4.0                    py35_0  
argcomplete               1.0.0                    py35_1  
argparse                  1.4.0                     <pip>
astropy                   1.1.2               np110py35_0  
attrs                     15.2.0                    <pip>
autoenv                   1.0.0                     <pip>
babel                     2.3.3                    py35_0  
backports                 1.0                      py35_0  
beautifulsoup4            4.4.1                    py35_0  
bitarray                  0.8.1                    py35_0  
blaze-core                0.9.0                    py35_0  
bokeh                     0.11.1                   py35_0  
boto                      2.40.0                   py35_0  
bottleneck                1.0.0               np110py35_0  
cffi                      1.6.0                    py35_0  
clyent                    1.2.2                    py35_0  
colorama                  0.3.7                    py35_0  
conda                     4.1.6                    py35_0  
conda-build               1.20.3                   py35_0  
conda-env                 2.5.1                    py35_0  
configobj                 5.0.6                    py35_0  
coverage                  4.0.3                     <pip>
coverage                  4.0.3                    py35_0  
cryptography              1.3.1                    py35_0  
cssselect                 0.9.1                     <pip>
curl                      7.45.0                        0  
cycler                    0.10.0                   py35_0  
cython                    0.24                     py35_0  
cytoolz                   0.7.5                    py35_0  
datashape                 0.5.2                    py35_0  
decorator                 4.0.9                    py35_0  
Django                    1.9.2                     <pip>
django                    1.9.5                    py35_0  
docutils                  0.12                     py35_0  
dynd-python               0.7.2                    py35_0  
entrypoints               0.2                      py35_1  
enum34                    1.1.2                     <pip>
et_xmlfile                1.0.1                    py35_0  
fastcache                 1.0.2                    py35_0  
flake8                    2.5.1                    py35_0  
flask                     0.10.1                   py35_1  
fontconfig                2.11.1                        5  
freetype                  2.5.5                         0  
futures                   3.0.3                    py35_0  
get_terminal_size         1.0.0                    py35_0  
greenlet                  0.4.9                    py35_0  
h5py                      2.6.0               np110py35_1  
hdf5                      1.8.16                        0  
idna                      2.1                      py35_0  
imagesize                 0.7.1                    py35_0  
ipykernel                 4.3.1                    py35_0  
ipython                   4.2.0                    py35_0  
ipython-notebook          4.0.4                    py35_0  
ipython-qtconsole         4.0.1                    py35_0  
ipython_genutils          0.1.0                    py35_0  
ipywidgets                4.1.1                    py35_0  
itsdangerous              0.24                     py35_0  
jbig                      2.1                           0  
jdcal                     1.2                      py35_0  
jedi                      0.9.0                    py35_0  
jellyfish                 0.5.2                     <pip>
jinja2                    2.8                      py35_0  
jpeg                      8d                            0  
jsonschema                2.5.1                    py35_0  
jupyter                   1.0.0                    py35_2  
jupyter_client            4.2.2                    py35_0  
jupyter_console           4.1.1                    py35_0  
jupyter_core              4.1.0                    py35_0  
libdynd                   0.7.2                         0  
libffi                    3.2.1                         0  
libgfortran               3.0.0                         1  
libpng                    1.6.17                        0  
libsodium                 1.0.3                         0  
libtiff                   4.0.6                         1  
libxml2                   2.9.2                         0  
libxslt                   1.1.28                        0  
llvmlite                  0.10.0                   py35_0  
lxml                      3.6.0                    py35_0  
markupsafe                0.23                     py35_0  
matplotlib                1.5.1               np110py35_0  
mccabe                    0.3.1                    py35_0  
mistune                   0.7.2                    py35_0  
mkl                       11.3.3                        0  
mkl-service               1.1.2                    py35_1  
mpmath                    0.19                     py35_1  
multipledispatch          0.4.8                    py35_0  
munkres                   1.0.7                     <pip>
musicbrainzngs            0.5                       <pip>
mutagen                   1.31                      <pip>
nbconvert                 4.2.0                    py35_0  
nbformat                  4.0.1                    py35_0  
networkx                  1.11                     py35_0  
nltk                      3.2.1                    py35_0  
nose                      1.3.7                    py35_0  
notebook                  4.2.0                    py35_0  
numba                     0.25.0              np110py35_0  
numexpr                   2.5.2               np110py35_1  
numpy                     1.10.4                   py35_2  
odo                       0.5.0                    py35_0  
openblas                  0.2.14                        0  
openpyxl                  2.3.2                    py35_0  
openssl                   1.0.2h                        0  
pandas                    0.18.1              np110py35_0  
patchelf                  0.8                           0  
path.py                   8.2.1                    py35_0  
patsy                     0.4.1                    py35_0  
pbr                       1.8.1                     <pip>
pep8                      1.7.0                    py35_0  
pexpect                   4.0.1                    py35_0  
pickleshare               0.5                      py35_0  
pillow                    3.2.0                    py35_0  
pip                       8.1.1                    py35_1  
pip                       8.1.2                     <pip>
ply                       3.8                      py35_0  
psutil                    4.2.0                    py35_0  
ptyprocess                0.5                      py35_0  
py                        1.4.31                   py35_0  
pyasn1                    0.1.9                    py35_0  
pyasn1-modules            0.0.8                     <pip>
pycosat                   0.6.1                    py35_0  
pycparser                 2.14                     py35_0  
pycrypto                  2.6.1                    py35_0  
pycurl                    7.19.5.3                 py35_0  
pyflakes                  1.0.0                     <pip>
pyflakes                  1.1.0                    py35_0  
pygments                  2.1.3                    py35_0  
pyopenssl                 0.15.1                   py35_2  
pyparsing                 2.1.1                    py35_0  
pyperclip                 1.5.26                    <pip>
pyqt                      4.11.4                   py35_1  
PyQt5                     5.6                       <pip>
pytables                  3.2.2               np110py35_3  
pytest                    2.9.1                     <pip>
pytest                    2.9.2                    py35_0  
pytest-qt                 1.11.0                    <pip>
python                    3.5.1                         5  
python-dateutil           2.5.3                    py35_0  
pytz                      2016.4                   py35_0  
pyyaml                    3.11                     py35_1  
pyzmq                     15.2.0                   py35_0  
qt                        4.8.7                         1  
qtconsole                 4.2.1                    py35_0  
queuelib                  1.4.2                     <pip>
readline                  6.2                           2  
redis                     2.6.9                         0  
redis-py                  2.10.3                   py35_0  
requests                  2.10.0                   py35_0  
rope                      0.9.4                    py35_1  
ruamel_yaml               0.11.7                   py35_0  
scikit-image              0.12.3              np110py35_0  
scikit-learn              0.17.1              np110py35_1  
scipy                     0.17.1              np110py35_0  
Scrapy                    1.0.5                     <pip>
selenium                  2.53.2                    <pip>
service-identity          16.0.0                    <pip>
setuptools                20.7.0                   py35_0  
simplegeneric             0.8.1                    py35_0  
sip                       4.16.9                   py35_0  
sip                       4.18                      <pip>
six                       1.10.0                   py35_0  
snowballstemmer           1.2.1                    py35_0  
sockjs-tornado            1.0.1                    py35_0  
sphinx                    1.4.1                    py35_0  
sphinx_rtd_theme          0.1.9                    py35_0  
spyder                    2.3.8                    py35_1  
spyder-app                2.3.8                    py35_0  
sqlalchemy                1.0.13                   py35_0  
sqlite                    3.13.0                        0  
statsmodels               0.6.1               np110py35_0  
stevedore                 1.10.0                    <pip>
sympy                     1.0                      py35_0  
system                    5.8                           2  
terminado                 0.5                      py35_1  
theano                    0.7.0               np110py35_0  
tk                        8.5.18                        0  
toolz                     0.7.4                    py35_0  
tornado                   4.3                      py35_0  
traitlets                 4.2.1                    py35_0  
Twisted                   15.5.0                    <pip>
ujson                     1.35                     py35_0  
unicodecsv                0.14.1                   py35_0  
Unidecode                 0.4.19                    <pip>
util-linux                2.21                          0  
virtualenv                14.0.3                    <pip>
virtualenv-clone          0.2.6                     <pip>
virtualenvwrapper         4.7.1                     <pip>
w3lib                     1.13.0                    <pip>
werkzeug                  0.11.9                   py35_0  
wheel                     0.29.0                   py35_0  
xlrd                      0.9.4                    py35_0  
xlsxwriter                0.8.7                    py35_0  
xlwt                      1.0.0                    py35_0  
xz                        5.2.2                         0  
yaml                      0.1.6                         0  
zeromq                    4.1.3                         0  
zlib                      1.2.8                         0  
zope.interface            4.1.3                     <pip>

(edited by @The-Compiler to add code block formatting around outputs/code)

[The-Compiler]

This should probably have gone to the pytest-qt issue tracker but I'll answer here anyways 😉

According to that output, you do have PyQt4 installed:

pyqt                      4.11.4                   py35_1

Do you set PYTEST_QT_API=pyqt5 in your environment to select that? If not, you should. Otherwise, pytest-qt prefers PyQt4 and imports that, which I believe leads to the error you're seeing - @nicoddemus probably knows more 😉

We'll soon release pytest-qt 2.0 which will prefer PyQt5 by default and also lets you configure the Qt API in your pytest.ini.

[mandeep]

Hi The-Compiler, thanks for answering my question here. I tried setting my environment variable and removing qt4, unfortunately I still receive qt4 related errors. There's no rush to write these tests, so I will happily wait for pytest-qt 2.0. Thanks again, Mandeep.

[The-Compiler]

Weird - do you still get the exact same error?

[RonnyPfannschmidt]

btw, can we close this on the pytest tracker, its a pytest-qt issue and the next pytest-qt will fix it

[The-Compiler]

I'm closing it - I don't see any issue so far though, pytest-qt works fine with PyQt4 or PyQt5 (with both installed) here when PYTEST_QT_API is set correctly.

[mandeep]

Turns out it was an issue with the environment. Thanks all.