Install of Pillow fails

[snippsat]

Is there a good tutorial on how to manage multiple Python versions?

I do have it link i posted under Access other versions.
When install Python 3.7 it also install py.exe in windows folder.
py can be used to access all Python version installed.

G:\
λ py -3.4 -V
Python 3.4.2

G:\
λ py -2.7 -V
Python 2.7.9


# So running a file with Python 2 would be
λ py -2.7 version.py
Hello from 2.7.9 (default, Dec 10 2014, 12:24:55) [MSC v.1500 32 bit (Intel)]

G:\
λ py -3.5 version.py
Hello from 3.5.2 (v3.5.2:4def2a2901a5, Jun 25 2016, 22:01:18) [MSC v.1900 32 bit (Intel)]

Install with pip to other version would be.

λ py -3.5 -m pip install logzero
Collecting logzero
Requirement already satisfied: colorama; sys_platform == "win32" in c:\python35\lib\site-packages (from logzero)
Installing collected packages: logzero
Successfully installed logzero-1.5.0