title: installing xlrd in to python3.6
body: <p>I have been trying to install xlrd into my computer but keep on popping out the below error msg. </p>
  
  <blockquote>
    <p>'pip' is not recognized as an internal or external command,
    operable program or batch file.</p>
  </blockquote>
  
  <p>I am not sure what I am doing wrong here. </p>
  
  <p>Version of Python is 3.6 in my computer</p>
  
  <p>Thanks</p>