title: h2o: iterate through rows
body: <p>I know h2o's internal data model is column oriented (namely an H2OFrame is a collection of H2OVec). However, the library I'd like to use requires to iterate through the rows of an H2OFrame.</p>
  
  <p>Is there a clean way to get an iterator on the rows or do I need to resort to indexing like</p>
  
  <pre><code>iris = h2o.import_file(path=".../iris_wheader.csv")
  for i in xrange(iris.nrow):
      foo( iris[i,:].as_data_frame(use_pandas=False)[1] )
  </code></pre>
  
  <p>I know it's going to be slow, I'm using <code>h2o.h2o.export_file</code> when possible.</p>