Solution to Jupyter Error of Consistent Restart

While I was trying to run jupyter notebook, I noticed some weird error where the notebook keeps restarting with some error. 

    self.asyncio_loop.run_forever()

  File "/usr/lib/python3.5/asyncio/base_events.py", line 340, in run_forever

    raise RuntimeError('Event loop is running.')

RuntimeError: Event loop is running.

After some time searching for solution on Google, here is what I found: I simply need to re-install some of the jupyter-related packages.

$ pip uninstall ipykernel ipython jupyter_client jupyter_core traitlets ipython_genutils -y

$ pip install ipykernel ipython jupyter_client jupyter_core traitlets ipython_genutils

Now, the jupyter notebook runs just fine. I suppose the problem was that I installed some packages that somehow interfered with the already-installed jupyter related packages above and caused the error. After removing and re-installing the jupyter-related packages, jupyter finally seems to run just fine!