Install pysqlcipher on Ubuntu - ImportError

From python 2.7, I'm developing a program which requires the encryption a database. In this way, I wish to install on my PC, with Ubuntu, the fork of pysqlite I mean pysqlcipher. I'm following this tutorial but when I enter this code in my terminal:

python setup.py build_sqlcipher

I get this Error Message:

Traceback (most recent call last):
  File "setup.py", line 38, in <module>
    import setuptools
ImportError: No module named setuptools

I don't understand because I have already installed setuptools.

Thank you for everyone helping me!