title: python dynamodb get 1000 entries
body: <p>I am using amazon dynamodb and accessing it via the python boto query interface. I have a very simple requirement</p>
  
  <ol>
  <li><p>I want to get 1000 entries. But I don't know the primary keys beforehand. I just want to get 1000 entries. How can I do this? ...I know how to use the query_2 but that requires knowing primary keys beforehand.</p></li>
  <li><p>And maybe afterwards I want to get another different 1000 and go on like that. You can consider it as sampling without replacement.How can I do this?</p></li>
  </ol>
  
  <p>Any help is much appreciated.</p>