code: def _set_constance_value(key, value):
      
  
      form = ConstanceForm(initial=get_values())
  
      field = form.fields[key]
  
      clean_value = field.clean(field.to_python(value))
      setattr(config, key, clean_value)
docs: Parses and sets a Constance value from a string
      :param key:
      :param value:
      :return: