title: ImportError: No module named PBKDF2
body: <p>Trying to implement password encryption and decryption in python on google app engine. Made some research and from this <a href="https://stackoverflow.com/questions/13227509/password-encryption-and-decryption-in-google-app-engine">thread</a> i learned of PBKDF2 . i have installed the module using <code>pip install pbkdf2</code> and have downloaded the entire package as illustrated <a href="https://www.dlitz.net/software/python-pbkdf2/" rel="nofollow noreferrer">here</a> and <a href="https://pypi.python.org/pypi/pbkdf2/1.3" rel="nofollow noreferrer">here</a>. Still when importing the module as <code>from PBKDF2 import PBKDF2</code> , i still get <code>ImportError: No module named PBKDF2</code> is there anything i am missing and how do i fix this? Thanks.</p>