When I try to run app.py (Python 3.3, PyCrypto 2.6) my virtualenv keeps returning the error listed above. My import statement is just from Crypto.Cipher import AES
from Crypto.Cipher import AES
Uninstalling crypto and pycrypto works on me. Then install only pycrypto:
crypto
pycrypto
pip uninstall crypto pip uninstall pycrypto pip install pycrypto