title: How to store timestamps in array?
body: <p>I need to import some series of measurements of several users from an excel file . For further calculation I also need the timestamp. I was thinking to store it in an array, but it's not working.</p>
  
  <pre><code>for n in range(len(users)):
      sheet = pe.get_sheet(file_name=users[n],name_columns_by_row=0)
      sheet = sheet.to_array()
      data_meas = np.array(sheet)
      data_no_time=(data_meas[2:,2:].astype(np.float))
      #print(data_meas)
  
      # get timestamps 
      for row in range(len(data_meas)-2):
          input_time = data_meas[row+2,1]
          input_date = data_meas[row+2,0]
  
          times =datetime.datetime.strptime(input_date, "%d/%m/%Y %H:%M:%S")
          datarr = np.array(times, 'datetime64[us]')
  </code></pre>
  
  <p>Does anybody know how to handle this?
  Thanks!</p>