def add_grades(cid, period):
course = db.GqlQuery("SELECT * FROM Course WHERE cid=:1", cid).fetch(1)[0]
grades = simplejson.loads(course.grades)
for grade in grades:
new_grade = Grade()
new_grade.cid = cid
new_grade.cname = course.name
new_grade.grade = grade["grade"]
new_grade.sid = grade["sid"]
new_grade.period = grade["period"]
new_grade.put()
