gistfile1.txt

$ ipython-3.5 notebook
Traceback (most recent call last):
  File "/opt/local/bin/ipython-3.5", line 4, in <module>
    from IPython import start_ipython
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/IPython/__init__.py", line 48, in <module>
    from .core.application import Application
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/IPython/core/application.py", line 24, in <module>
    from IPython.core import release, crashhandler
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/IPython/core/crashhandler.py", line 28, in <module>
    from IPython.core import ultratb
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/IPython/core/ultratb.py", line 121, in <module>
    from IPython.utils.terminal import get_terminal_size
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/IPython/utils/terminal.py", line 27, in <module>
    import backports.shutil_get_terminal_size
ImportError: No module named 'backports'