title: grouping dataframe based on specific column value
body: <p>I am working on realtime project.I have I dataframe  looks like below.</p>
  <h2>| id   | name   | values|</h2>
  <p>| 101  | a      | 13    |</p>
  <p>| 101  | b      | 14    |
  |  cv   |
  59  |</p>
  <p>| 101  | c      | 13    |
  | 23    |</p>
  <p>| 102  | a      | 13    |</p>
  <p>| 102  | b      | 14    |
  |  cv   |
  56  |</p>
  <p>| 102  | c      | 17    |
  | 23</p>
  <p>I need the data fame looks like below when the value is same like 'cv'</p>
  <p>| 101  | a      | 13    |</p>
  <p>| 101  | b      |  cv   |</p>
  <p>| 101  | c      | 13    |
  | 23    |</p>
  <p>| 102  | a      | 13    |</p>
  <p>| 102  | b      |  cv   |</p>
  <p>| 102  | c      | 17    |
  23    |</p>