title: Python file open from path containing numbers
body: <p>i have the following problem during file open:
  Using PyQt QFileDialog I get path for files from user which I would like to read it</p>
  
  <pre><code>def read_file(self):
          self.t_file = (QFileDialog.getOpenFileNames(self, 'Select File', '','*.txt'))
  </code></pre>
  
  <p>Unfortunately I cannot open a file if the path has numbers in it:
  Ex: </p>
  
  <pre><code>'E:\test\02_info\test.txt'
  </code></pre>
  
  <p>I tried</p>
  
  <pre><code>f1 = open(self.t_file,'r')
  </code></pre>
  
  <p>Could anyone help me to read files from such a path format?
  Thank you in advance.</p>
  
  <p>EDIT:
  I get the following error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "&lt;pyshell#27&gt;", line 1, in &lt;module&gt;
      f1 = open(self.t_file,'r')
  IOError: [Errno 22] invalid mode ('r') or filename: 'E:\test\x02_info\test.txt'
  </code></pre>