Import error with pip 9.0.2 #95
Description
Importing the authorizenet library fails with pip 9.0.2:
File "/srv/wing/.env/local/lib/python2.7/site-packages/authorizenet/apicontrollers.py", line 9, in <module>
from authorizenet import apicontrollersbase
File "/srv/wing/.env/local/lib/python2.7/site-packages/authorizenet/apicontrollersbase.py", line 11, in <module>
from pip._vendor import requests
File "/srv/wing/.env/local/lib/python2.7/site-packages/pip/__init__.py", line 45, in <module>
from pip.vcs import git, mercurial, subversion, bazaar # noqa
File "/srv/wing/.env/local/lib/python2.7/site-packages/pip/vcs/mercurial.py", line 9, in <module>
from pip.download import path_to_url
File "/srv/wing/.env/local/lib/python2.7/site-packages/pip/download.py", line 40, in <module>
from pip._vendor import requests, six
File "/srv/wing/.env/local/lib/python2.7/site-packages/pip/_vendor/requests/__init__.py", line 98, in <module>
from . import packages
File "/srv/wing/.env/local/lib/python2.7/site-packages/pip/_vendor/requests/packages.py", line 12, in <module>
sys.modules['pip._vendor.requests.packages.' + mod] = sys.modules["pip._vendor." + mod]
KeyError: 'pip._vendor.urllib3.contrib'
Pip 9.0.2 was literally released a couple hours ago as I write this, and it seems like pip changed its vendored packages around, including upgrading requests and explicitly vendoring urllib3 (see this commit).
However, this isn't a pip problem, this is a problem with using pip's vendored version of requests instead of an explicit dependency.