how to check which libraries are installed in python code example

Example 1: where are python libraries installed in windows

pip list -v  # Or pip3 list -v 

# output example (windows 10):
# Package                   Version   Location                                                         Installer
# ------------------------- --------- ---------------------------------------------------------------- ---------
# adal                      0.4.5     c:\users\test\appdata\roaming\python\python36\site-packages      pip
# aiocache                  0.10.0    c:\program files\python36\lib\site-packages

Example 2: where are python libraries installed in windows

Python usually stores its library (and thereby your site-packages folder) 
in the installation directory. So, if you had installed Python to 
C:\Python\, the default library would reside in C:\Python\Lib\ 
and third-party modules should be stored in C:\Python\Lib\site-packages.