Cannot install Beautiful Soup in Anaconda Python 3.6.4 Windows 10
Run the following command from Command Prompt: 
conda install -c anaconda beautifulsoup4
This is the easiest way to install a python library in Anaconda.
I install Beautiful Soup in Anaconda Python 3.6.4 Windows 10:

I downloaded and unpacked beautifulsoup4-4.6.3.tar.gz on my Desktop
I created an environment variable Pythonbasepath including the following directories:

C:\Users\Mika and Friends\Anaconda3
C:\Users\Mika and Friends\Anaconda3\Lib
C:\Users\Mika and Friends\Anaconda3\include
C:\Users\Mika and Friends\Anaconda3\DLLs
C:\Users\Mika and Friends\Anaconda3\Scripts
C:\Users\Mika and Friends\Anaconda3\Lib\site-packages

From the directory where I have extracted Beautiful Soup I try to run a command and I get an error: 


C:\Users\Mika and Friends\Desktop\bs4\bs4>python setup.py install
  'python' is not recognized as an internal or external command,
  operable program or batch file.

It seems something is wrong with the environment variable setup, but I cannot figure out what.