Employeeクラスにprintf()メソッドを追加する

# Python Object-Oriented Programming [9].py
from datetime import datetime as dt

class Employee:
    def __init__(self, first: str, last: str, date_of_birth: str) -> None:
        if not first:
            raise ValueError('Missing first name')
        if not last:
            raise ValueError('Missing last name') 
        if not date_of_birth:
            raise ValueError('Missing date of birth')      
        self.first = first
        self.last = last        
        try:
            self.date_of_birth = dt.strptime(date_of_birth, '%Y-%m-%d').date()
        except:
            raise ValueError(f"Invalid 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}"

    def printf(self, id: str) -> str:
        match id:
            case 'JP':
                return f"Full Name: 🗾 {self.last} {self.first}, Date of birth: {self.date_of_birth:%Y/%m/%d}"    
            case 'US':
                return f"Full Name: 🇺🇸 {self.first} {self.last}, Date of birth: {self.date_of_birth:%m-%d-%Y} ({self.date_of_birth:%B %d, %Y})" 
            case 'GB':
                return f"Full Name: 🇬🇧 {self.first} {self.last}, Date of birth: {self.date_of_birth:%d-%m-%Y} ({self.date_of_birth:%d %B %Y})" 
            case 'ISO':
                return f"Full Name: ISO {self.first} {self.last}, Date of birth: {self.date_of_birth:%Y-%m-%d}" 
            case _:
                return f"Full Name: 😄 {self.first} {self.last}, Date of birth: {self.date_of_birth:%Y-%m-%d}"         


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.printf('US'))

Live DEMO