qt4 Clipboard error on Ubuntu 14.04

Question

Trying to run an external program that uses the python backend and after having installed the canopy package (after also trying the 'manual' pyface builds) I keep getting a weird and seemingly very basic error. Any suggestions would be most welcome!

Traceback (most recent call last):
  File "/usr/local/bin/melview", line 9, in <module>
    load_entry_point('melview==1.0', 'console_scripts', 'melview')()

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 351, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2363, in load_entry_point
    return ep.load()

  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2088, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])

  File "build/bdist.linux-x86_64/egg/melview/melodic_traits.py", line 42, in <module>

  File "/usr/local/lib/python2.7/dist-packages/pyface-4.4.0-py2.7.egg/pyface/api.py", line 19, in <module>
    from clipboard import clipboard, Clipboard

  File "/usr/local/lib/python2.7/dist-packages/pyface-4.4.0-py2.7.egg/pyface/clipboard.py", line 23, in <module>
    clipboard = Clipboard()

  File "/usr/local/lib/python2.7/dist-packages/pyface-4.4.0-py2.7.egg/pyface/toolkit.py", line 92, in __init__
    raise NotImplementedError("the %s pyface backend doesn't implement %s" % (ETSConfig.toolkit, oname))

NotImplementedError: the qt4 pyface backend doesn't implement Clipboard

Answer 1

This answer may be quite late for you but posting here for everyone's benefit.

This issue is mainly because of a missing "traitsui" dependency in pyface setup.py script. You can workaround this by manually installing traitsui.