Django Install Error: " SyntaxError: future feature unicode_literals is not defined "

I am new to programming in general and I am struggling to install Django.  I downloaded the gar file, unzipped it and then attempted to do the " sudo python setup.py install " command in the terminal (I'm working on a Mac OS X 10.5.8) but was given the following message : 

Traceback (most recent call last):

  File "setup.py", line 80, in <module>

    version = __import__('django').get_version()

  File "/Users/byronprice/Downloads/Django-1.6.1/django/__init__.py", line 6, in get_version

    from django.utils.version import get_version

  File "/Users/byronprice/Downloads/Django-1.6.1/django/utils/version.py", line 1

    from __future__ import unicode_literals

SyntaxError: future feature unicode_literals is not defined

I imagine unicode_literals is part of the Python library and that perhaps in version 3.3 the name was changed to something slightly different.  Does anyone have any ideas??

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