title: FInding Value from excel sheet in python
body: <p>I have an excel sheet (data.xlxs) with the following pattern of data with more than 200 rows.</p>
  
  <pre><code>NS71282379_67698209    123456001
  NS71282379_56698765    123456002
  NS71282379_67698209    123456003
  .
  .
  .
  </code></pre>
  
  <p>Now in my script, I am trying to find the corresponding value for <code>123456003</code> as <code>NS71282379_67698209</code>. In my script, I want to replace 123456003 with its value from the excel sheet. 
  I used <code>xlrd</code> to import the sheet but haven't found any method which easily allows me to find the corresponding value. 
  How can I do this smartly?</p>