ImportError: Cannot load backend 'MacOSX' which requires the 'macosx' interactive framework, as 'qt5' is currently running

[adamerose]

ImportError: Cannot load backend 'MacOSX' which requires the 'macosx' interactive framework, as 'qt5' is currently running

[adamerose]

@selasley I made it set the backend to Qt5Agg, let me know if that fixes it I don't have a Mac to test on. But this does add a side effect to importing pandasgui which is bad, so maybe there's a better solution

[selasley]

The problem appears to be associated with ipython. In a virtualenv with pandasgui 0.1.3 and ipython 7.5.0 this code

import pandas as pd
from pandasgui import show

example_df = pd.DataFrame(pd.np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]]),
                          columns=['a', 'b', 'c'])
show(example_df)

works in when run as a script and in the python3 repl. It also works in a Jupyter notebook, but when run in the ipython3 7.5.0 repl the "'qt5' is currently running" error occurs. The code works in ipython3 if I set the backend to Qt5Agg before calling show(). I will try testing on a different Mac to see if this error is unique to my setup. If I am the only person seeing this error on a Mac, there is no need to have pandasgui set the backend.

Here is the tail of the error message starting from the last pandasgui call

...
~/pdgui/lib/python3.7/site-packages/pandasgui/widgets/image_viewer.py in __init__(self, fig)
     72         super().__init__()
     73 
---> 74         self.canvas = FigureCanvasQTAgg(fig)
     75         self.toolbar = NavigationToolbar2QT(self.canvas, self)
     76 

~/pdgui/lib/python3.7/site-packages/matplotlib/backends/backend_qt5agg.py in __init__(self, figure)
     19     def __init__(self, figure):
     20         # Must pass 'figure' as kwarg to Qt base class.
---> 21         super().__init__(figure=figure)
     22 
     23     def paintEvent(self, event):

~/pdgui/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py in __init__(self, figure)
    224     def __init__(self, figure):
    225         _create_qApp()
--> 226         super().__init__(figure=figure)
    227 
    228         self.figure = figure

~/pdgui/lib/python3.7/site-packages/matplotlib/backend_bases.py in __init__(self, figure)
   1580 
   1581     def __init__(self, figure):
-> 1582         self._fix_ipython_backend2gui()
   1583         self._is_idle_drawing = True
   1584         self._is_saving = False

~/pdgui/lib/python3.7/site-packages/matplotlib/backend_bases.py in _fix_ipython_backend2gui(cls)
   1627             try:
   1628                 mpl.rcParamsOrig["backend"] = mpl.rcParams["backend"]
-> 1629                 ip.enable_matplotlib()
   1630             finally:
   1631                 mpl.rcParamsOrig["backend"] = orig_origbackend

~/pdgui/lib/python3.7/site-packages/IPython/core/interactiveshell.py in enable_matplotlib(self, gui)
   3382                 gui, backend = pt.find_gui_and_backend(self.pylab_gui_select)
   3383 
-> 3384         pt.activate_matplotlib(backend)
   3385         pt.configure_inline_support(self, backend)
   3386 

~/pdgui/lib/python3.7/site-packages/IPython/core/pylabtools.py in activate_matplotlib(backend)
    312 
    313     import matplotlib.pyplot
--> 314     matplotlib.pyplot.switch_backend(backend)
    315 
    316     # This must be imported last in the matplotlib series, after

~/pdgui/lib/python3.7/site-packages/matplotlib/pyplot.py in switch_backend(newbackend)
    228                 "Cannot load backend {!r} which requires the {!r} interactive "
    229                 "framework, as {!r} is currently running".format(
--> 230                     newbackend, required_framework, current_framework))
    231 
    232     rcParams['backend'] = rcParamsDefault['backend'] = newbackend

ImportError: Cannot load backend 'MacOSX' which requires the 'macosx' interactive framework, as 'qt5' is currently running

[adamerose]

Closing for now since code base has changed a lot since this and I still have no mac to test with. If anyone has the same problem again feel free to re-open or make a new issue.