title: How to get columns(Series) back from dropped table?
body: <pre><code>print(df)
  
      Names   Maths  Physics  Chemistry
  0   Khaja    75       91    84
  1   Srihari  81       89    71
  2   Krishna  69       77    76
  3   jain     87       69    68
  4   shakir   79       70    74
  
  df.drop(['Chemistry'],axis=1,inplace=True)
  
  df
  
      Names   Maths   Physics
  0   Khaja     75      91
  1   Srihari   81      89
  2   Krishna   69      77
  3   jain      87      69
  4   shakir    79      70
  </code></pre>
  
  <blockquote>
    <p>How to get back the dropped column from the table. I tried to get back
    the column with reset_drop() but it doesn't work.</p>
    
    <p>The final outcome should look like this:</p>
  </blockquote>
  
  <pre><code> print(df)
  
          Names   Maths  Physics  Chemistry
      0   Khaja    75       91    84
      1   Srihari  81       89    71
      2   Krishna  69       77    76
      3   jain     87       69    68
      4   shakir   79       70    74
  </code></pre>