title: pandas.read_csv duplicate issue
body: <p><strong>Solution:</strong> removing the print statement shows the data once. But I do not understand the logic behind this?</p>
  
  <p>This seems like a very straightforward issue but I am having a great deal of trouble finding a solution or anyone else that has replicated this issue.</p>
  
  <p>I am simply trying to read some data from a csv using pandas. The csv is fairly large and I thought was the cause of the issue but I created a new test case csv by hand which is simply a 3x3 grid:</p>
  
  <pre><code> A  b  c
   1  2  3
   4  5  6
  </code></pre>
  
  <p>This also caused the issue that I have not seen before. Essentially when I interact with the dataframe it is replicated twice.</p>
  
  <pre><code>import json #(for later use)
  import pandas as pd
  import numpy as np
  
  data = pd.read_csv("Workbook1.csv")
  
  print (data)
  </code></pre>
  
  <p>output:    </p>
  
  <pre><code>   A  b  c
  0  1  2  3
  1  4  5  6
     A  b  c
  0  1  2  3
  1  4  5  6
  
  print (type(data))
  </code></pre>
  
  <p>output: </p>
  
  <pre><code>&lt;class 'pandas.core.frame.DataFrame'&gt;
  &lt;class 'pandas.core.frame.DataFrame'&gt;
  </code></pre>
  
  <p>It's not the case that I can drop the first few rows to delete one half either:</p>
  
  <pre><code>data.drop(data.index[0], axis =0, inplace = True)
  print (data)
  </code></pre>
  
  <p>output:</p>
  
  <pre><code>   A  b  c
  1  4  5  6
     A  b  c
  1  4  5  6
  </code></pre>
  
  <p>It seems like the strangest problem that I have not seen before from using pandas and reading files multiple times with no such similar issue.</p>
  
  <p><strong>Edit</strong>
  Further to this, when I remove the <code>'import json'</code> at the top, the script fails all together stating that <code>'module' object has no attribute 'read_csv'</code></p>
  
  <pre><code>  import pandas as pd
    import numpy as np
  
    data = pd.read_csv('Workbook1.csv')
    data
  </code></pre>
  
  <p>Results in AttributeError: 'module' object has no attribute 'read_csv'</p>