def do_check_in(self, args):
        """check_in [student_id][class_id]
		Accepts a student id and class id
		"""
        data = args.split()
        db = Database()
        db.check_in(data[0], data[1])
    def do_check_out(self, args):
        """check_in [student_id][class_id][reason]
		Accepts a student id ,class id and reason
		"""
        data = args.split()
        db = Database()
        db.check_out(data[0], data[1], data[2])
    def do_log_start(self, class_id):
        """log_start [class_id]
		Accepts a class id
		"""
        db = Database()
        db.log_start(class_id)
    def do_log_end(self, class_id):
        """log_end [class_id]
		Accepts a class id
		"""
        db = Database()
        db.log_end(class_id)
    def do_class_add(self, name):
        """class_add [name]
		Add the name of a class
		"""
        db = Database()
        db.class_add(name)
    def do_class_remove(self, class_id):
        """class_remove [class_id]
		Accepts a class id
		"""
        db = Database()
        db.class_remove(class_id)
    def do_student_remove(self, student_id):
        """student_remove [student_id]
		Accepts a student id
		"""
        db = Database()
        db.student_remove(student_id)
    def do_student_add(self, name):
        """student_add [name]
		Add the name of a student
		"""
        db = Database()
        db.student_add(name)
    def do_track_student_list(self, args):
        """Lists all students and classes they attended
		"""
        db = Database()
        db.track_student_list()
    def do_class_list(self, args):
        """Lists all classes
		"""
        db = Database()
        db.class_list()
    def do_student_list(self, args):
        """Lists all students
		"""
        db = Database()
        db.student_list()