class Base:
    # Contains object id
    id = 0
    # Contains object id created to database
    idDataBase = 0
    # Contains all de object children
    child = []
    # Contains name
    name = ""
    # Contains errors
    error = None

    def __init__(self):
        pass

    def add_error(self, err):
        """
        Add errors to property error
        :param err: Constains a string with error description
        """
        if not self.error:
            self.error = []
        self.error.append(err)