traitlets.traitlets.TraitError in Pycharm

Question

I am a beginner in python. I am facing the following problem.

Whenever I start pycharm Community edition (version 5.0.3), the Python console fails to starts and shows th

Answer 1

I've found that this happened because I had installed ipython version 4.x, and then reverted to 3.2.0, without uninstalling the traitlets more advanced version first. This did the trick then:

pip uninstall ipython[all]
pip uninstall traitlets
pip install ipython==3.2.0