Cannot install Orange 3 ImportError: PyQt4, PyQt5 or PySide are not available for import

Question

I am using Ubuntu 14.04. I have created a virtual environment and installed Orange using

pip install orange3

I also installed PyQt4 using

 sudo apt-get install python3-pyqt4

But when I launch orange3 from terminal I got the following error.

Traceback (most recent call last):
  File "/home/arun/.virtualenvs/orange3env/bin/orange-canvas", line 11, in <module>
    load_entry_point('Orange3', 'gui_scripts', 'orange-canvas')()
  File "/home/arun/.virtualenvs/orange3env/lib/python3.4/site-packages/pkg_resources/__init__.py", line 561, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/home/arun/.virtualenvs/orange3env/lib/python3.4/site-packages/pkg_resources/__init__.py", line 2649, in load_entry_point
    return ep.load()
  File "/home/arun/.virtualenvs/orange3env/lib/python3.4/site-packages/pkg_resources/__init__.py", line 2303, in load
    return self.resolve()
  File "/home/arun/.virtualenvs/orange3env/lib/python3.4/site-packages/pkg_resources/__init__.py", line 2309, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/home/arun/lab/orange3/Orange/canvas/__main__.py", line 21, in <module>
    from AnyQt.QtGui import QFont, QColor, QDesktopServices
  File "/home/arun/.virtualenvs/orange3env/lib/python3.4/site-packages/AnyQt/QtGui.py", line 1, in <module>
    from . import _api
  File "/home/arun/.virtualenvs/orange3env/lib/python3.4/site-packages/AnyQt/_api.py", line 96, in <module>
    raise ImportError("PyQt4, PyQt5 or PySide are not available for import")
ImportError: PyQt4, PyQt5 or PySide are not available for import

The problem with PyQt4 installed via APT not being seen by Orange is that the two things were likely installed in two different virtual environments (APT installs into a system environment). You can try to mitigate it by re-creating the virtual environment, but this time also passing --system-site-packages switch to virtualenv, or you could install Orange system-wide by skipping virtualenv step altogether. — K3---rnc

K3---rnc K3---rnc · Accepted Answer · 2017-06-22T16:16:57

Seems like you are missing a version of PyQt in the environment you run Orange from.

Best do something like pip3 install pyqt5 in the same terminal you pip-installed Orange.

Cannot install Orange 3 ImportError: PyQt4, PyQt5 or PySide are not available for import

2 Answers