title: How to decode a csv file with long lines in tensorflow with tf.decode_csv?
body: <p>How to decode a <code>csv</code> file with long lines(e.g., with many items per line so as not realistic to list them one by one for output) with tf.TextLineReader() and tf.decode_csv?</p>
  
  <p>The typical usage is:     </p>
  
  <pre><code>reader = tf.TextLineReader()    
  key, value = reader.read(filename_queue)    
  record_defaults = [1,1,1,1,1]    
  a,b,c,d,e =  tf.decode_csv(records=value,record_defaults=record_defaults, field_delim=" ")
  </code></pre>
  
  <p>When we have thousands of items in a line, it's impossible to assign them one by one as (a,b,c,d,e) above, can all the items be decoded to a list or something like that?</p>