Python file read, split, and sort by item

Python file read, split, and sort by item

I am trying to read a file of grades, names, and assignments. All of the
items are mixed in the files and in no way sorted. I am trying to find a
code that allows me to split the list, sort the list, then print the list
in an ordered way sorted by columns and with the averages of the students
grades present. Also, if a student received a zero on an assignment, no
number is present in the file, but a "0" needs to be present in the print.
THANK YOU!