title: Python does not recognise text files in a directory
body: <p>The following piece of code works fine, reads all the text files in the specified directory:    </p>
  
  <pre><code>files_ = glob.glob('D:\Test files\Case 1\*.txt')
  </code></pre>
  
  <p>But when I change the path to another directory, it gives me an empty list of files:</p>
  
  <pre><code>files_ = glob.glob('D:\Test files\Case 2\*.txt')
  print files_ &gt;&gt; []
  </code></pre>
  
  <p>Both directories contain a couple of text files. Text file names and sizes are different though. 
  It's really wired and I couldn't think of any thing to solve the problem. Has anyone faced such a problem?</p>