title: Forward slash in json file from pandas dataframe
body: <p>I'm a complete newbie to json, any help is appreciated.  I'm trying to convert a dataframe to a json file.</p>
  
  <pre><code>import pandas as pd
  
  df = pd.DataFrame({ 'A' : [1., 2.5],
                      'B' : ['img/blue.png', 'img/red.png']})
  print df
  </code></pre>
  
  <p>Output is</p>
  
  <pre><code>    A             B
  0  1.0  img/blue.png
  1  2.5   img/red.png
  </code></pre>
  
  <p>I would like to make a json file that looks like this:</p>
  
  <pre><code>'[1.0,"img/blue.png"],[2.5,"img/red.png"]'
  </code></pre>
  
  <p>However, when I use the following</p>
  
  <pre><code>out = df.to_json(orient='values')[1:-1]
  print out
  </code></pre>
  
  <p>I get this instead</p>
  
  <pre><code>'[1.0,"img\\/blue.png"],[2.5,"img\\/red.png"]'
  </code></pre>
  
  <p>How can I get the forward slash to print correctly in the json file?</p>