text: from flee import flee
  from flee.datamanager import handle_refugee_data
  from flee.datamanager import DataTable
  import numpy as np
  import flee.postprocessing.analysis as a
  import sys
  
  """
  calc_date_difference.py
  Calculates the number of days between two dates.
  
  Usage python3 calc_date_difference.py <YYYY-MM-DD earlier date> <YYYY-MM-DD later date>
  
  """
  
  
  if __name__ == "__main__":
      print(DataTable.subtract_dates(sys.argv[2], sys.argv[1]))
  