Employeeクラスにプロパティ(Getter/Setter)を追加する

# Python Object-Oriented Programming [10].py
from datetime import datetime as dt

class Employee:
    def __init__(self, first: str, last: str, date_of_birth: str) -> None:
        self.first = first
        self.last = last
        self.date_of_birth = date_of_birth 

    def __str__(self) -> str:
        return f"Full Name: {self.first} {self.last}, Date of birth: {self.date_of_birth:%Y-%m-%d}"

    @property
    def first(self) -> str:
        return self._first

    @property
    def last(self) -> str:
        return self._last

    @property
    def date_of_birth(self):
        return self._date_of_birth        

    @first.setter
    def first(self, first: str):
        if not first:
            raise ValueError('Missing first name')
        self._first = first    

    @last.setter
    def last(self, last: str):
        if not last:
            raise ValueError('Missing last name')          
        self._last = last    

    @date_of_birth.setter
    def date_of_birth(self, date_of_birth: str):
        if not date_of_birth:
            raise ValueError('Missing date of birth')          
        try:
            self._date_of_birth = dt.strptime(date_of_birth, '%Y-%m-%d').date()
        except:
            raise ValueError('Invalid date of birth') 

def get_employee() -> Employee:
    first = input('First name: ')     
    last = input('Last name: ')   
    date_of_birth = input('Date of birth (yyyy-mm-dd): ')
    return Employee(first, last, date_of_birth) # return class 

employee = get_employee() # get class       
print(employee)

Live DEMO