title: How to remove invalid character in filename under windows using Python
body: <p>I need to do lots of work about powerpoint files , 
  I use win32com to handle the job,
  I'm a Taiwanese , My OS is WIndows 7-64bit traditional version,
  and there will some chinese character in file name,
  however some character are not allowed to be a file_name in windows.</p>
  
  <pre><code>like '\xe8\xaa\xb2\x0b\xe6\xb0\xb4'
  </code></pre>
  
  <p>the above line contains invalid character in windows,
  how could i remover the invalid character?
  actually, \xe8\xaa\xb2\x0b\xe6\xb0\xb4 is a string , if i print it out,it will show strange symbol in my console.
  however i don't know which character is the strange symbol.</p>
  
  <p>thank you very much in advance!!</p>