title: How to delete a file with invalid name using python?
body: <p>I've got a <code>file</code> named <code>umengchannel_316_豌豆荚</code> I want to delete this file..
  I tried the following: <code>os.remove()</code>, <code>os.unlink()</code> , <code>shutil.move()</code> but nothing seems to work..
  Are there any other approaches to this problem?</p>