AttributeError: module 'rules' has no attribute 'apply_rules'

[perryraskin]

Getting this error after following all instructions:

Traceback (most recent call last):
  File "mbox_parser.py", line 124, in <module>
    row = rules.apply_rules(date, sent_from, sent_to, cc, subject, contents, owners, blacklist_domains)
AttributeError: module 'rules' has no attribute 'apply_rules'