%matplotlib qt5 kills the kernel #3205
Description
Hi,
I recently changed my computer,
From
macOS Sierra 10.12.6
conda 4.3.30
Jupyter 4.1.0
matplotlib 1.5.1
Python 2.7.11 | Annaconda custom(x86_64) [GCC 4.2.1 (Apple Inc. build 5577) on darwin
To
High Sierra 10.13.2
Jupyter 4.4.0
conda 4.3.30
matplotlib 2.1.1
Python 2.7.14 |Anaconda custom (64-bit)| (default, Dec 7 2017, 11:07:58)
[GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)] on darwin
I had several problem with running my old plotting code, so I tried changing the backend but still problems persist,
like in macosx backend plot in interactive window not opening.
Transparency not working for tkAgg backend
Now i trying to switch to qt5 but everytime i do %matplotlib qt5 it kills the kernel and I get following output.
objc[35078]: Class RunLoopModeTracker is implemented in both /usr/local/opt/qt/lib/QtCore.framework/Versions/5/QtCore (0x10a645368) and /Users/username/anaconda2/lib/libQt5Core.5.6.2.dylib (0x10f19d8b8). One of the two will be used. Which one is undefined.
QObject::moveToThread: Current thread (0x7fe8d965d030) is not the object's thread (0x7fffb0f64340).
Cannot move to target thread (0x7fe8d965d030)
You might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.
This application failed to start because it could not find or load the Qt platform plugin "cocoa"
in "".
Available platform plugins are: cocoa, minimal, offscreen.
Reinstalling the application may fix this problem.
Also,
print os.environ.get('QT_API')
>> None
Update :
I unisntalled qt from brew brew uninstall qt and now I can do %matplotlib qt5 without crashing the kernel.
But now I cannot import pyplot.
import matplotlib.pyplot as plt
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-5-eff513f636fd> in <module>()
----> 1 import matplotlib.pyplot as plt
/Users/jasonkhadka/anaconda2/lib/python2.7/site-packages/matplotlib/pyplot.py in <module>()
113
114 from matplotlib.backends import pylab_setup
--> 115 _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
116
117 _IP_REGISTERED = None
/Users/jasonkhadka/anaconda2/lib/python2.7/site-packages/matplotlib/backends/__init__.pyc in pylab_setup()
30 # imports. 0 means only perform absolute imports.
31 backend_mod = __import__(backend_name,
---> 32 globals(),locals(),[backend_name],0)
33
34 # Things we pull in from all backends
/Users/jasonkhadka/anaconda2/lib/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py in <module>()
14
15 from .backend_agg import FigureCanvasAgg
---> 16 from .backend_qt5 import QtCore
17 from .backend_qt5 import QtGui
18 from .backend_qt5 import FigureManagerQT
/Users/jasonkhadka/anaconda2/lib/python2.7/site-packages/matplotlib/backends/backend_qt5.py in <module>()
24
25 from matplotlib.widgets import SubplotTool
---> 26 import matplotlib.backends.qt_editor.figureoptions as figureoptions
27
28 from .qt_compat import (QtCore, QtGui, QtWidgets, _getSaveFileName,
/Users/jasonkhadka/anaconda2/lib/python2.7/site-packages/matplotlib/backends/qt_editor/figureoptions.py in <module>()
18 import matplotlib
19 from matplotlib import cm, markers, colors as mcolors
---> 20 import matplotlib.backends.qt_editor.formlayout as formlayout
21 from matplotlib.backends.qt_compat import QtGui
22
/Users/jasonkhadka/anaconda2/lib/python2.7/site-packages/matplotlib/backends/qt_editor/formlayout.py in <module>()
54
55 from matplotlib import colors as mcolors
---> 56 from matplotlib.backends.qt_compat import QtGui, QtWidgets, QtCore
57
58
/Users/jasonkhadka/anaconda2/lib/python2.7/site-packages/matplotlib/backends/qt_compat.py in <module>()
126 if QT_API == QT_API_PYQT5:
127 try:
--> 128 from PyQt5 import QtCore, QtGui, QtWidgets
129 _getSaveFileName = QtWidgets.QFileDialog.getSaveFileName
130 except ImportError:
ImportError: cannot import name QtCore```
where as `import matplotlib` works fine.