title: How to create DataFrame in pandas python
body: <p>I have a csv file.</p>
  
  <pre><code>index  value    d F
  0    975  25.35   5
  1    976  26.28   4
  2    977  26.24   1
  3    978  25.76   0
  4    979  26.08   0
  </code></pre>
  
  <p>I created a dataframe from CSV file this way.
  df = pd.read_csv("ThisFileL.csv")</p>
  
  <p>I want to reconstruct a new DataFrame in my way by coppying the 2nd Columns three times.</p>
  
  <pre><code>data = pd.DataFrame()
  data.add(df.value)
  data.add(df.value)
  data.add(df.value)
  </code></pre>
  
  <p>But it didn't work out. How can I do that? </p>