title: Python Pandas How to read json without sorting by the index?
body: <p>If i have a json file like this, and import it to dataframe, the column order is always sort -0.8, -0.9. i want the order maintain as it is defined in the json which is -0.9, -0.8</p>
  
  
  
  <pre class="lang-html prettyprint-override"><code>{
      "-0.90": {
          "A": 1.0,
          "B": 0.4935585804
      },
      "-0.80": {
          "A": 1.0,
          "B": 0.4935585804
      }
  }
  </code></pre>