title: converting object to int of a large dataframe
body: <p>how can I convert a large dataframe of a column from object to int.</p>
  
  <p>Dataframe :</p>
  
  <pre><code>user              
  1101110110100        
  1111222555555
  1112223365556
  1113656560005
  asaseee"
  tdyhhdy"
  
  dtype: object
  </code></pre>
  
  <p>expected:</p>
  
  <pre><code>user
  1101110110100
  1111222555555
  1112223365556
  1113656560005
  
  dtype: int64
  </code></pre>
  
  <p>I have used the below codes.</p>
  
  <pre><code>df['user'].astype(int)
  df['user'].astype(str).astpe(int)
  </code></pre>