TypeError: '>=' not supported between instances of 'NoneType' and 'int'

[cs.z]

python visualmetrics.py --check

Traceback (most recent call last):
File "visualmetrics.py", line 1907, in
main()
File "visualmetrics.py", line 1794, in main
elif options.verbose >= 4:
TypeError: '>=' not supported between instances of 'NoneType' and 'int'