When I attempt to import
File "<stdin>", line 1, in <module>
File "build/bdist.macosx-10.11-intel/egg/hashlib.py", line 115, in <module>
TypeError: 'frozenset' object is not callable
I had the same problem yesterday, Hashlib wasn't installed and trying to install it using pip would give that error. I fixed it by installing it using easy_install instead.
Also I had to install Scipy and Microsoft Visual C++ Compiler for Python 2.7 on Windows, they were required for Hashlib