course

class Course():
    def __init__(self, c_code, m_size):
        self.__c_code = c_code
        self.__m_size = m_size
        self.__roster = []
    def add_student(self, ID):
        if ID in self.__roster:
            print("You are already enrolled in that course")
        elif len(self.__roster) < self.__m_size:
            print("Course added")
            self.__roster.append(ID)
        else:
            print("Course already full")
    def drop_student(self, ID):
        if ID in self.__roster:
            print("Course dropped")
            self.__roster.remove(ID)
        else:
            print("Course not found")
    def display_roster(self):
        print("Current enrollment:", ', '.join(self.__roster))
        print("Number of student(s):", len(self.__roster.sort()))
    def change_max_size(self):
        print("Current enrollment:", len(self.__roster))
        print("Current max size:", self.__m_size)
        new_max = int(input("Enter new max size: "))
        while(new_max < len(self.__c_code)):
            print("New max size cannot be smaller than current enrollment")
            new_max = int(input("Enter new max size: "))
        self.__m_size = new_max
    def get_course_code(self):
        return self.__c_code
    def student_in_course(self, ID):
        if ID in self.__roster:
            return True
        else:
            return False