title: Escaping double quotes inside a json text that is built with double quotes (pandas dataframe)
body: <p>I have a large dataframe and one column stores json-dictionary type values, such as:</p>
  
  <pre><code>{"comment": "This is a "Great" restaurant"}
  </code></pre>
  
  <p>The problem is that there are un-escaped double quotes inside the dictionary. Is there a handy way to escape these quotes, instead of manually adding <code>\</code> to each of them (got more than 4000 rows)? Any ideas?</p>