Trying to add a node with the add_node.py script

I get the following errors:

Add an SNMP v2c node:

/usr/lib/python2.7/site-packages/urllib3/connectionpool.py:769: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.org/en/latest/security.html

  InsecureRequestWarning)

Adding node 127.0.0.1... DONE!

Traceback (most recent call last):

  File "add_node2.py", line 71, in <module>

    main()

  File "add_node2.py", line 33, in main

    nodeid = re.search('(\d+)$', results).group(0)

  File "/usr/lib64/python2.7/re.py", line 142, in search

    return _compile(pattern, flags).search(string)

TypeError: expected string or buffer

Any ideas?