CMSSW_8_0_X cannot use the htcondor python bindings as installed using the system python in RHEL7 operating systems.
There is a method to install and use (automatically) the correct versions of the bindings.
This can enable e.g. the use of manageJobs.py from CondorProduction.
This method depends on scram-pip from lpc-scripts, which is available on cvmfs at /cvmfs/cms-lpc.opensciencegrid.org/FNALLPC/lpc-scripts/scram-pip.
Assuming you are in a CMSSW_8_0_X release area and have already done cmsenv, execute these bash commands:
HOME=$CMSSW_BASE python -m ensurepip --user
scram-pip -d $CMSSW_BASE/.local