title: How to get detail (Title,Artist) from .mp3 files in python using eyed3
body: <p>Here is my code</p>
  
  <pre><code>import eyed3
  
  audiofile = eyed3.load("19 Calvin Harris - Summer.mp3")
  
  print(audiofile.tag.artist)
  </code></pre>
  
  <p>This is an error </p>
  
  <pre><code>Traceback (most recent call last):
    File "C:\Python34\testmp3.py", line 5, in &lt;module&gt;
      print(audiofile.tag.artist)
  AttributeError: 'NoneType' object has no attribute 'artist'
  </code></pre>
  
  <p>There's attributes shown in Visual Studio. but when i run it.an error occurred</p>
  
  <p>when i write <code>print(audiofile)</code> it works. i don't know why
  ps. Python 3.4.</p>