If you are trying to install gssapi with pip, it's common to have the following error.
Traceback (most recent call last): File "<string>", line 1, in <module> File "/tmp/pip-install-sadads/gssapi/setup.py", line 109, in <module> raise Exception("Could not find main GSSAPI shared library. Please " Exception: Could not find main GSSAPI shared library. Please try setting GSSAPI_MAIN_LIB yourself or setting ENABLE_SUPPORT_DETECTION to 'false'
sudo apt-get install python-pip libkrb5-dev sudo pip install gssapi