title: Finding if the time is before or after another time with .datetime
body: <p>so I have a column of data in a dataframe which is time in .datetime, in HH:MM:SS.  I just want to check if the time is in the first or the second shift, I have this code shown at the end but I keep getting the error:</p>
  <p><strong>TypeError: 'DataFrame' object is not callable</strong></p>
  <p>Anyone got any ideas? Thanks in advance!</p>
  <pre><code>if df_data_time(df_data_time['Time']).between('00:00:00','11:59:59') == True:
      df_data_time['Time'] = 'Shift 1'
  if df_data_time(df_data_time['Time']).between('12:00:00','23:59:59') == True:
      df_data_time['Time'] = 'Shift 2'
  </code></pre>