install ipython

sudo pip install ipython

Error: Operation not permittaed

Disabled SIP(System Integrity Protection)

sudo reboot
Command + R 
csrutil disable 
sudo reboot
sudo pip install ipython
ipython

Error:
File "/Library/Python/2.7/site-packages/IPython/utils/terminal.py", line 22, in <module>
from backports.shutil_get_terminal_size import get_terminal_size as _get_terminal_size

vi /Library/Python/2.7/site-packages/IPython/utils/terminal.py

Line 22: from backports.shutil_get_terminal_size import get_terminal_size as _get_terminal_size
changed:
Line 22: #from backports.shutil_get_terminal_size import get_terminal_size as _get_terminal_size
Line 23: from shutil_backports import get_terminal_size as _get_terminal_size

Done.