alternative_constructors_4.py

class Student():
    
    def __init__(self, first_name, last_name, birth_year, emergency_contact):
        self.first_name = first_name
        self.last_name = last_name
        self.birth_year = birth_year
        self.emergency_contact = emergency_contact
        
    @classmethod
    def from_string(cls, student_string):
        first_name, last_name, birth_year, emergency_contact = student_string.split("-")
        return cls(first_name, last_name, birth_year, emergency_contact)