title: Excel diff with python
body: <p>I am looking for an algorithm to comapre two excel sheets, based on their column names, in Python.</p>
  
  <p>I do not know what the columns are, so one sheet may have an additional column or both sheets can have several columns with the same name.</p>
  
  <p>The easiest case is when a column in the first sheet corresponds to only one column in the second excel sheet. Then I can perform the diff on rows of that column using <code>xlrd</code>.
  If the column name is not unique, I can verify if the columns have the same position.</p>
  
  <p>Does anyone know of an already existing algorithm or have any experience in this domain?</p>