init_constructor_decorator

init_constructor_decorator.py

# __init__ method with a decorator
def attr_validation(method):
    def inner(ref, name, age, location):
        for attr in [name, location]:
            if not isinstance(attr, str):
                raise TypeError('Name and Location attributes must be of type str')
        if not isinstance(age, int):
            raise TypeError('Age attributes must be of type int')
        return method(ref, name, age, location)
    return inner


class Employees(object):
    @attr_validation
    def __init__(self, name, age, location):
        self._name = name
        self._age = age
        self._locaton = location


# e1 = Employees('stephen', 30, 'Bournemouth')
e1 = Employees('stephen', '30', 'Bournemouth')

for key, value in e1.__dict__.items():
    print('{}: {}'.format(key, value))


# Console Output
TypeError: Age attributes must be of type int