ImportError: No module named six - Already Installed six - python-2.7

Question

I've installed six with the command
pip install six
and if I print the version with:
python -c "import six; print (six.__version__)"
the version of six is listed as:
1.10.0
I'm trying to convert my Python program into stand-alone executable.
I've tried py2exe and PyInstaller. Both create the package fine but when I run the main.exe I get a brief flash with the following error:
Traceback (most recent call last):
File "main.py", line 9, in <module>
File "requests\__init__.pyc", line 58, in <module>
File "requests\utils.pyc", line 26, in <module>
File "requests\compat.pyc", line 7, in <module>
File "requests\packages\__init__.pyc", line 7, in <module>
File "urllib3\__init__.pyc", line 10, in <module>
File "urllib3\connectionpool.pyc", line 30, in <module>
File "urllib3\packages\six.pyc", line 5, in <module>
ImportError: No module named six
Can someone help me understand how to use this traceback to fix my issue?
I have tried to include six in my setup.py for p2exe:
from distutils.core import setup
import py2exe
setup(windows=[{"script":"main.py"}], options={"py2exe":{"includes":["six"]}})
But alas it did not work.

Answer 1

pip install urllib3 --upgrade
solved the issue.
Found this here: https://stackoverflow.com/a/44071536/3804349