class Package:
    def __init__(self, id):
        self.id = id
        self.status = "준비중"

    def update_status(self, new_status):
        self.status = new_status
        if self.status == "완료":
            print("배송이 끝났습니다")


package = Package("PKG-001")

print("현재 상태:", package.status)  
package.update_status("배송중")
print("현재 상태:", package.status)  
package.update_status("완료")
print("현재 상태:", package.status)