old_contents: __author__ = "Sylvain Dangin"
  __licence__ = "Apache 2.0"
  __version__ = "1.0"
  __maintainer__ = "Sylvain Dangin"
  __email__ = "sylvain.dangin@gmail.com"
  __status__ = "Development"
  
  class is_empty():
      def test_filter(params, current_row, current_index):
          """Test if a column is empty.
  
          :param params: Column to test
          :param current_row: Data of the current row
          :param current_index: Current index of the row
          
          :return: True if the column is empty.
          :rtype: Boolean
          """
          if isinstance(params, str):
              params = int(str)
          if isinstance(params, int):
              if current_row[params - 1] == '':
                  return True
          return False
  
new_contents: __author__ = "Sylvain Dangin"
  __licence__ = "Apache 2.0"
  __version__ = "1.0"
  __maintainer__ = "Sylvain Dangin"
  __email__ = "sylvain.dangin@gmail.com"
  __status__ = "Development"
  
  class is_empty():
      def test_filter(params, current_row, current_index):
          """Test if a column is empty.
  
          :param params: Column to test
          :param current_row: Data of the current row
          :param current_index: Current index of the row
          
          :return: True if the column is empty.
          :rtype: Boolean
          """
          if isinstance(params, str):
              params = int(str)
          if isinstance(params, int):
              if current_row[params - 1] == '' or current_row[params - 1] == None:
                  return True
          return False
  
subject: Update is_empty filter for none column value