def initialize_diary():
diary = Diary(STUDENTS, CLASSES, DATES)
for i in xrange(NUMBER_OF_SCORES):
diary.add_score(random.choice(CLASSES), random.choice(STUDENTS),
random.choice(SCORES))
for clazz in CLASSES:
for date in DATES:
for student in STUDENTS:
if random.choice([True, False]):
diary.add_attendance(clazz, student, date)
return diary
