/home/user/scripts# python contact_search.py  -f 'Firstname Lastname' -l
Traceback (most recent call last):
  File "contact_search.py", line 55, in <module>
    main()
  File "contact_search.py", line 52, in main
    search_contact(options)
  File "contact_search.py", line 13, in search_contact
    for c in ebook.get_all_contacts():
AttributeError: 'NoneType' object has no attribute 'get_all_contacts'