Created attachment 1343258 [details]
Modified tmp.py file

Description of problem:
After I messed up my spyder3 installation by installing various packages (in an attend to solve bug 1502871), I ended up with an unusable graphic backend "Automatic".


Version-Release number of selected component (if applicable):
python3-spyder.noarch                   3.2.2-1.fc26                    @updates


How reproducible:
On my system it's very reproducible.

Steps to Reproduce:
1. Install lots of things.
2. Reset spyder3 to its default settings.
3. Set tmp.py in ~/.local/spyder-py3 to the tmp.py file of the attachment.
4. Select the graphic backend "Automatic" from Tool -> Preferences -> IPython Console -> Graphics tab - Backend selection [Automatic]
5. Run tmp.py file.


Actual results:
The IPython console shows the following error:

runfile('~/.config/spyder-py3/temp.py', wdir='~/.config/spyder-py3')
Traceback (most recent call last):

  File "<ipython-input-1-318aad34c252>", line 1, in <module>
    runfile('~/.config/spyder-py3/temp.py', wdir='~/.config/spyder-py3')

  File "/usr/lib/python3.6/site-packages/spyder/utils/site/sitecustomize.py", line 707, in runfile
    execfile(filename, namespace)

  File "/usr/lib/python3.6/site-packages/spyder/utils/site/sitecustomize.py", line 101, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "~/.config/spyder-py3/temp.py", line 8, in <module>
    import matplotlib.pyplot as plt

  File "/usr/lib64/python3.6/site-packages/matplotlib/pyplot.py", line 115, in <module>
    _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()

  File "/usr/lib64/python3.6/site-packages/matplotlib/backends/__init__.py", line 32, in pylab_setup
    globals(),locals(),[backend_name],0)

  File "/usr/lib64/python3.6/site-packages/matplotlib/backends/backend_qt4agg.py", line 18, in <module>
    from .backend_qt5agg import FigureCanvasQTAggBase as _FigureCanvasQTAggBase

  File "/usr/lib64/python3.6/site-packages/matplotlib/backends/backend_qt5agg.py", line 16, in <module>
    from .backend_qt5 import QtCore

  File "/usr/lib64/python3.6/site-packages/matplotlib/backends/backend_qt5.py", line 26, in <module>
    import matplotlib.backends.qt_editor.figureoptions as figureoptions

  File "/usr/lib64/python3.6/site-packages/matplotlib/backends/qt_editor/figureoptions.py", line 20, in <module>
    import matplotlib.backends.qt_editor.formlayout as formlayout

  File "/usr/lib64/python3.6/site-packages/matplotlib/backends/qt_editor/formlayout.py", line 56, in <module>
    from matplotlib.backends.qt_compat import QtGui, QtWidgets, QtCore

  File "/usr/lib64/python3.6/site-packages/matplotlib/backends/qt_compat.py", line 127, in <module>
    from PyQt5 import QtCore, QtGui, QtWidgets

RuntimeError: the PyQt5.QtCore and PyQt4.QtCore modules both wrap the QObject class


Expected results:
Spyder3 shows the expected graphic.


Additional info:
Sorry that I'm filing so many bugs this afternoon but if you need further information, just say it.