virtualization script relys on a python3ism that isn't present in 14.04

Traceback (most recent call last):
  File "/tmp/nest-d_nz3pmh.7007398bb2463d62371992a24fe15a5c6a2024514a57448d1151ab0beae02024/virtualization", line 34, in <module>
    from requests.packages.urllib3.exceptions import NewConnectionError
ImportError: No module named 'requests.packages'

14.04
ii  python3-requests                       2.2.1-1ubuntu0.3

16.04
ii  python3-requests                       2.9.1-3

The line in question is this:
from requests.packages.urllib3.exceptions import NewConnectionError