Description: When trying to call the pip tool (in the python3 version) it fails with ModuleNotFoundError: No module named 'pip._vendor.requests.exceptions'


Additional info:
* package version(s): 10.0.1-1

* config and/or log files etc.

sechacklabs@SecHackLabs:~$ pip --help
Traceback (most recent call last):
File "/usr/bin/pip", line 11, in <module>
load_entry_point('pip==10.0.1', 'console_scripts', 'pip')()
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 476, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2700, in load_entry_point
return ep.load()
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2318, in load
return self.resolve()
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2324, in resolve
module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "/usr/lib/python3.6/site-packages/pip/_internal/__init__.py", line 42, in <module>
from pip._internal import cmdoptions
File "/usr/lib/python3.6/site-packages/pip/_internal/cmdoptions.py", line 16, in <module>
from pip._internal.index import (
File "/usr/lib/python3.6/site-packages/pip/_internal/index.py", line 20, in <module>
from pip._vendor.requests.exceptions import SSLError
ModuleNotFoundError: No module named 'pip._vendor.requests.exceptions'


Steps to reproduce:

1) Open a terminal.
2) Try to call pip from the terminal.
3) Wait for error.