Ubuntu - How to install a Python module (BeautifulSoup) on Python 3.3 instead of Python 2.7?

Question

I have this code (as written in BS4 documentaion):

  from bs4 import BeautifulSoup

When I run the script (using python3) I get the error:

Answer 1

I have often referenced the documentation link: https://docs.python.org/3/installing/

Some examples:

 python2   -m pip install SomePackage  # default Python 2 
 python2.7 -m pip install SomePackage  # specifically Python 2.7 
 python3   -m pip install SomePackage  # default Python 3 
 python3.4 -m pip install SomePackage  # specifically Python 3.4