title: Can't launch Jupyter Notebook on osx -
body: <p>I installed jupyter on my macbook pro (10.10), using pip install jupyter, it completed sucessfully. However, when trying to run the </p>
  
  <pre><code>jupyter notebook 
  </code></pre>
  
  <p>command - I get the following errors. </p>
  
  <p>Traceback (most recent call last):
      File "/usr/local/bin/jupyter-notebook", line 11, in 
         sys.exit(main())</p>
  
  <pre><code>File "/Library/Python/2.7/site-packages/jupyter_core/application.py", line   267, in launch_instance
  return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
  File "/Library/Python/2.7/site-packages/traitlets/config/application.py",   line 591, in launch_instance
   app.initialize(argv)
  File "&lt;string&gt;", line 2, in initialize
   File "/Library/Python/2.7/site-packages/traitlets/config/application.py", line 75, in catch_config_error
   return method(app, *args, **kwargs)
   File "/Library/Python/2.7/site-packages/notebook/notebookapp.py", line 1008, in initialize
    self.init_terminals()
   File "/Library/Python/2.7/site-packages/notebook/notebookapp.py", line 908, in init_terminals
    from .terminal import initialize
   File "/Library/Python/2.7/site-packages/notebook/terminal/__init__.py", line 3, in &lt;module&gt;
   import terminado
    File "/Library/Python/2.7/site-packages/terminado/__init__.py", line 7, in &lt;module&gt;
    logging.getLogger(__name__).addHandler(logging.NullHandler())
    AttributeError: 'module' object has no attribute 'NullHandler'
  </code></pre>
  
  <p>Can you please advise..</p>
  
  <pre><code>per additional requested info
  
  bash-3.2$ python --version 
  Python 2.7.10
  bash-3.2$ echo $PYTHONPATH
  
  bash-3.2$ which -a python
  /usr/bin/python
  </code></pre>