Ubuntu 16.04
Python 3.5.2
matplotlib 1.5.1
PyQt5 5.7

Installed using pip in anaconda

QObject::connect: Cannot connect NavigationToolbar2QT::message(QString) to (null)::_show_message()
Traceback (most recent call last):
File "test_conv.py", line 14, in
plt.plot(xvals)
File "/home/padraig/.local/lib/python3.5/site-packages/matplotlib/pyplot.py", line 3147, in plot
ax = gca()
File "/home/padraig/.local/lib/python3.5/site-packages/matplotlib/pyplot.py", line 928, in gca
return gcf().gca(*_kwargs)
File "/home/padraig/.local/lib/python3.5/site-packages/matplotlib/pyplot.py", line 578, in gcf
return figure()
File "/home/padraig/.local/lib/python3.5/site-packages/matplotlib/pyplot.py", line 527, in figure
*_kwargs)
File "/home/padraig/.local/lib/python3.5/site-packages/matplotlib/backends/backend_qt5agg.py", line 43, in new_figure_manager
return new_figure_manager_given_figure(num, thisFig)
File "/home/padraig/.local/lib/python3.5/site-packages/matplotlib/backends/backend_qt5agg.py", line 51, in new_figure_manager_given_figure
return FigureManagerQT(canvas, num)
File "/home/padraig/.local/lib/python3.5/site-packages/matplotlib/backends/backend_qt5.py", line 465, in init
self.toolbar.message.connect(self._show_message)
TypeError: connect() failed between NavigationToolbar2QT.message[str] and _show_message()