title: How to import data from mongodb to pandas?
body: <p>I have a large amount of data in a collection in mongodb which I need to analyze. How do i import that data to pandas?</p>
  
  <p>I am new to pandas and numpy.</p>
  
  <p>EDIT:
  The mongodb collection contains sensor values tagged with date and time. The sensor values are of float datatype. </p>
  
  <p>Sample Data:</p>
  
  <pre><code>{
  "_cls" : "SensorReport",
  "_id" : ObjectId("515a963b78f6a035d9fa531b"),
  "_types" : [
      "SensorReport"
  ],
  "Readings" : [
      {
          "a" : 0.958069536790466,
          "_types" : [
              "Reading"
          ],
          "ReadingUpdatedDate" : ISODate("2013-04-02T08:26:35.297Z"),
          "b" : 6.296118156595,
          "_cls" : "Reading"
      },
      {
          "a" : 0.95574014778624,
          "_types" : [
              "Reading"
          ],
          "ReadingUpdatedDate" : ISODate("2013-04-02T08:27:09.963Z"),
          "b" : 6.29651468650064,
          "_cls" : "Reading"
      },
      {
          "a" : 0.953648289182713,
          "_types" : [
              "Reading"
          ],
          "ReadingUpdatedDate" : ISODate("2013-04-02T08:27:37.545Z"),
          "b" : 7.29679823731148,
          "_cls" : "Reading"
      },
      {
          "a" : 0.955931884300997,
          "_types" : [
              "Reading"
          ],
          "ReadingUpdatedDate" : ISODate("2013-04-02T08:28:21.369Z"),
          "b" : 6.29642922525632,
          "_cls" : "Reading"
      },
      {
          "a" : 0.95821381,
          "_types" : [
              "Reading"
          ],
          "ReadingUpdatedDate" : ISODate("2013-04-02T08:41:20.801Z"),
          "b" : 7.28956613,
          "_cls" : "Reading"
      },
      {
          "a" : 4.95821335,
          "_types" : [
              "Reading"
          ],
          "ReadingUpdatedDate" : ISODate("2013-04-02T08:41:36.931Z"),
          "b" : 6.28956574,
          "_cls" : "Reading"
      },
      {
          "a" : 9.95821341,
          "_types" : [
              "Reading"
          ],
          "ReadingUpdatedDate" : ISODate("2013-04-02T08:42:09.971Z"),
          "b" : 0.28956488,
          "_cls" : "Reading"
      },
      {
          "a" : 1.95667927,
          "_types" : [
              "Reading"
          ],
          "ReadingUpdatedDate" : ISODate("2013-04-02T08:43:55.463Z"),
          "b" : 0.29115237,
          "_cls" : "Reading"
      }
  ],
  "latestReportTime" : ISODate("2013-04-02T08:43:55.463Z"),
  "sensorName" : "56847890-0",
  "reportCount" : 8
  }
  </code></pre>