Class and calling a method

[Mekire]

You need to construct the string in the __str__ method if that is what you want it to look like.
Also you need to decide if Student.course is a list or a single item.

class Student(object):
    def __init__(self, first_name, last_name, student_id, year):
        self.first_name = first_name
        self.last_name = last_name
        self.student_id = student_id
        self.year = year
        self.course = []
         
    def __str__(self):
        return "{} is enrolled in {}.".format(self.first_name, self.course)
         
    def enroll(self, course):
        self.course.append(course)
     
 
def main():
    student = Student('John', 'Smith', 'L01234567', 'senior')
    student.enroll('CSC225')
    print(student)
     

main()