setattr_dunder_method

setattr_dunder_method.py

class Employees(object):
    def __init__(self, name, age, id_number):
        self._name = name
        self._age = age
        self._id_number = id_number

    def __setattr__(self, key, value):
        if key == '_name' and hasattr(self, '_name'):
            raise AttributeError('The value for the name attribute has already been set, and can not be re-set')
        if key in ['_age', '_id_number']:
            self.__dict__[key] = int(value)
        self.__dict__[key] = value