app engine: ImportError: No module named Crypto.Hash

Question

I have a script that uses Crypto.Hash but import fails with error:

ImportError: No module named Crypto.Hash

in my sys.pa

Answer 1

Run the SDK from the command line with dev_appserver.py, rather than with the GUI (assuming you've already checked that it's installed via pip).

I've seen similar problems with App Engine not importing libraries locally, even though they're installed, and even though they work fine in production. MySQLDB comes to mind, although I can't find the reference. Anyway, this worked for me.

Answer 2

It seems a problem that happens on MAC OSX, all I have managed to do is following:

firstly you need to know where your install of pycripto is, running

sudo pip install pycrypto

either you install the library or you get the path where it is installed

Requirement already satisfied (use --upgrade to upgrade): pycrypto in ...

then, considering that this is a problem that does not happen in production on appengine, I did this:

try:
    from Crypto.Hash import SHA
except ImportError:
    import sys
    sys.path.append('/[mypath]/anaconda/lib/python2.7/site-packages')
    from Crypto.Hash import SHA # requires PyCrypto