Openstack Projects How to Find and Fix PEP 8 coding style Issues

1)
Goto your OpenStack Project
For example horizon
#cd /opt/stack/horizon

2)
How to do only PEP 8 Check
#./run_tests.sh -p -N

3)
How to see PEP 8 coding style Issues in a File
#./run_tests.sh -p -N | grep './openstack_dashboard/forms.py'

4)
Help
#./run_tests.sh --help