Student Management System Based on Flask

DONE

add a student to the class
delete a student from the class
student's information:
1. First name
2. Last name
3. Student id
4. Students major
5. Students email address
change/edit a grade
display the student roster and all grades
add an assignment to the gradebook
delete an assignment from the gradebook
display the students aggregate grade (assume all assignment are equally weighted)
display the student roster and grades, in alphabetical order.
display the data (all grades and other data) for a single student