title: A per-hour histogram of datetime using Pandas
body: <p>Assume I have a timestamp column of <code>datetime</code> in a <code>pandas.DataFrame</code>. For the sake of example, the timestamp is in seconds resolution. I would like to bucket / bin the events in 10 minutes [1] buckets / bins. I understand that I can represent the <code>datetime</code> as an integer timestamp and then use histogram. Is there a simpler approach? Something built in into <code>pandas</code>? </p>
  
  <p>[1] 10 minutes is only an example. Ultimately, I would like to use different resolutions.</p>