title: notMNIST not downloadable in TensorFlow Udacity course
body: <p>I'm doing the Udacity TensorFlow course, first exercise: <a href="https://github.com/tensorflow/tensorflow/blob/master/tensorflow/examples/udacity/1_notmnist.ipynb" rel="nofollow">https://github.com/tensorflow/tensorflow/blob/master/tensorflow/examples/udacity/1_notmnist.ipynb</a></p>
  
  <p>OSX 10.11 (El Capitan)
  Python 2.7
  virtualenv installation of TF</p>
  
  <p>I am getting an error:</p>
  
  <p>"Exception: Failed to verifynotMNIST_large.tar.gz. Can you get to it with a browser?"</p>
  
  <p>It finds the “small” file, but not the “large.”  Appreciate help.  Thanks.</p>
  
  <p>Here is the whole block of code:</p>
  
  <pre><code>&gt;&gt;&gt; url = 'http://yaroslavvb.com/upload/notMNIST/'
  &gt;&gt;&gt; 
  &gt;&gt;&gt; def maybe_download(filename, expected_bytes):
  ...   """Download a file if not present, and make sure it's the right size."""
  ...   if not os.path.exists(filename):
  ...     filename, _ = urlretrieve(url + filename, filename)
  ...   statinfo = os.stat(filename)
  ...   if statinfo.st_size == expected_bytes:
  ...     print('Found and verified', filename)
  ...   else:
  ...     raise Exception(
  ...       'Failed to verify' + filename + '. Can you get to it with a browser?')
  ...   return filename
  ... 
  </code></pre>
  
  <p>Here is what gets returned:</p>
  
  <pre><code> &gt;&gt;&gt; train_filename = maybe_download('notMNIST_large.tar.gz', 247336696)
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "&lt;stdin&gt;", line 10, in maybe_download
  Exception: Failed to verifynotMNIST_large.tar.gz. Can you get to it with a browser?
  &gt;&gt;&gt; test_filename = maybe_download('notMNIST_small.tar.gz', 8458043)
  Found and verified notMNIST_small.tar.gz
  </code></pre>