when i run 3D examples it does not work and i get this message:
Traceback (most recent call last):
File "<stdin>", line 10, in <module>
File "/usr/lib/python2.7/dist-packages/pyqtgraph/opengl/__init__.py", line 1, in <module>
from .GLViewWidget import GLViewWidget
File "/usr/lib/python2.7/dist-packages/pyqtgraph/opengl/GLViewWidget.py", line 1, in <module>
from ..Qt import QtCore, QtGui, QtOpenGL
ImportError: cannot import name QtOpenGL