title: Efficiently finding the last line in a text file
body: <p>I need to extract the last line from a number of very large (several hundred megabyte) text files to get certain data.  Currently, I am using python to cycle through all the lines until the file is empty and then I process the last line returned, but I am certain there is a more efficient way to do this.  </p>
  
  <p>What is the best way to retrieve just the last line of a text file using python?</p>