code: def is_all_field_none(self):
          
  
          if self._street is not None:
              return False
  
          if self._house_number is not None:
              return False
  
          if self._po_box is not None:
              return False
  
          if self._postal_code is not None:
              return False
  
          if self._city is not None:
              return False
  
          if self._country is not None:
              return False
  
          if self._province is not None:
              return False
  
          return True
docs: :rtype: bool