Cannot connect NavigationToolbar2QT

Hi,

I haven't used Matplotlib for a while but now I cannot use it anymore.
Even the simplest vector plot gives

import matplotlib.pyplot as plt

x=[0.0,0.1,0.2,0.3,0.4,0.5]
y=[x[i]**2 for i in range(0,6)]
plt.plot(x,y)

QObject::connect: Cannot connect NavigationToolbar2QT::message(QString)
to (null)::_show_message()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line
3147, in plot
     ax = gca()
   File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line
928, in gca
     return gcf().gca(**kwargs)
   File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line
578, in gcf
     return figure()
   File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line
527, in figure
     **kwargs)
   File
"/usr/lib64/python3.5/site-packages/matplotlib/backends/backend_qt5agg.py",
line 43, in new_figure_manager
     return new_figure_manager_given_figure(num, thisFig)
   File
"/usr/lib64/python3.5/site-packages/matplotlib/backends/backend_qt5agg.py",
line 51, in new_figure_manager_given_figure
     return FigureManagerQT(canvas, num)
   File
"/usr/lib64/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()

Has anybody got an idea what's going wrong here?

I have compiled Matploblib from source on my Gentoo system using Python
3.5.2 with the gtk3 and qt5 backend.

Many thanks for a hint,
Helmut

This is the same as https://github.com/matplotlib/matplotlib/issues/6853

which is fixed by https://github.com/matplotlib/matplotlib/pull/6854

Tom

···

On Wed, Aug 3, 2016 at 9:06 AM Helmut Jarausch <jarausch at skynet.be> wrote:

Hi,

I haven't used Matplotlib for a while but now I cannot use it anymore.
Even the simplest vector plot gives

import matplotlib.pyplot as plt
>>> x=[0.0,0.1,0.2,0.3,0.4,0.5]
>>> y=[x[i]**2 for i in range(0,6)]
>>> plt.plot(x,y)
QObject::connect: Cannot connect NavigationToolbar2QT::message(QString)
to (null)::_show_message()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line
3147, in plot
     ax = gca()
   File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line
928, in gca
     return gcf().gca(**kwargs)
   File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line
578, in gcf
     return figure()
   File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line
527, in figure
     **kwargs)
   File
"/usr/lib64/python3.5/site-packages/matplotlib/backends/backend_qt5agg.py",
line 43, in new_figure_manager
     return new_figure_manager_given_figure(num, thisFig)
   File
"/usr/lib64/python3.5/site-packages/matplotlib/backends/backend_qt5agg.py",
line 51, in new_figure_manager_given_figure
     return FigureManagerQT(canvas, num)
   File
"/usr/lib64/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()

Has anybody got an idea what's going wrong here?

I have compiled Matploblib from source on my Gentoo system using Python
3.5.2 with the gtk3 and qt5 backend.

Many thanks for a hint,
Helmut
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