title: Why install Python packages
body: <p>Why we have to install the python packages before using them?</p>
  
  <p>I am currently working on a small python mysql program. What i tried to download the python connector module from mysql webpage and simply unzip it and place it in the same folder of my code.</p>
  
  <p>And I can import the module properly.</p>
  
  <p>So what is the meaning of installing those packages? Can I use those packages like matplotlib, numpy without installing them ?</p>
  
  <p>Is it possible to have all the required packages installed on a folder so that i can move it to another computer and run my program with only CPython installed (I don't want to install any package on this computer)? </p>