'pip' is not recognized
<p>I tried to install <code>PySide</code> but I got error from the power shell as follows:</p>

<blockquote>
  <p>pip : The term 'pip' is not recognized as the name of a cmdlet,
  function, script file, or  operable program. Check the spelling of the
  name, or if a path was included, verify that  the path is correct and
  try again. At line:1 char:1<br>
  + pip install -U PySide<br>
  + ~~~<br>
      + CategoryInfo          : ObjectNotFound: (pip:String) [], CommandNotFoundException<br>
      + FullyQualifiedErrorId : CommandNotFoundException</p>
</blockquote>