class Student:
    def __init__(self):
        pass

student1 = Student()
student1.first_name = "kanz"
student1.last_name = "kang"

student2 = Student()
student2.first_name = "hong"
student2.last_name = "kong"

print(student1.last_name)
print(student2.last_name)

class Student:

    school = 'Online school'
    number_of_students = 0

    def __init__(self, first_name, last_name, major):
        self.first_name = first_name
        self.last_name = last_name
        self.major = major

        Student.number_of_students += 1 

    def fullname_with_major(self):
        return f'{self.first_name} {self.last_name} is a {self.major} major!'

    def fullname_major_school(self):
        return f'{self.first_name} {self.last_name} is a ' \\
                f'{self.major} going to {self.school}'    

    @classmethod
    def set_online_school(cls, new_school):
        cls.school = new_school                

    @classmethod
    def split_students(cls, student_str):
        first_name, last_name, major = student_str.split('.')
        return cls(first_name, last_name, major)

print(f'number of student = {Student.number_of_students}')
student1 = Student('eric', 'roby', 'computer science')
student2 = Student('john', 'miller', 'math')

print(student1.fullname_major_school())
print(student2.fullname_major_school())
print(f'number of student = {Student.number_of_students}')

print(student1.school)
print(student2.school)

Student.set_online_school("test school")

print(student1.school)
print(student2.school)

new_student = 'Adil.tui.english'

student3 = Student.split_students(new_student)
print(student3.fullname_with_major())