Grade book . i have to write a gradebook program in python, and i have list of students but in TEXT file an i have to make these operation . I attached my program in pictures... can anyone tell me...

Grade book . i have to write a gradebook program in python, and i have list of students but in TEXT file an i have to make these operation . I attached my program in pictures... can anyone tell me what mistakes i did? Thank you,

i have to write a gradebook program in python, and i have list of students but in TEXT file an i have to make these operation . I attached my program in pictures... can anyone tell me what mistakes i did? Thank you,