title: Python Bloomberg API pdblp intraday request
body: <p>pdblp allows daily historical Bloomberg requests via:</p>
  
  <pre><code>con = pdblp.BCon(debug=False)
  con = start()
  df = con.bdh(['SPY Equity'], 'PX_LAST', '20150103', '20150619')
  </code></pre>
  
  <p>How can intraday price/volume/open interest etc requests be made?</p>
  
  <p>Desired behavior resembling as below, the price on 15 minute intervals.</p>
  
  <pre><code>df = con.bdh(['SPY Equity'], 'PX_Last', ... , periodSelection = 'MINUTE', period=15)
  </code></pre>