title: Move data on top if a value exist in column of a dataframe
body: <p>I have a DataFrame like</p>
  
  <pre><code>id name isp
  z  god  promoted
  d  desk anyname
  f  zzz  promoted
  s  df   nope
  ds ddd  det
  </code></pre>
  
  <p>i want the output dataframe to have the values on top if their isp column value is "promoted"
  so the output dataframe will look like below:</p>
  
  <pre><code>id name isp
  z  god promoted
  f  zzz promoted
  d  desk anyname
  s  df   nope
  ds ddd  det
  </code></pre>
  
  <p>Any help thanks :)</p>