Can you help me$,$ please, modify my code?

Modify GradesFile class from Lecture $8$ Assignment. Add a new function called $$loadGradesData$.$ The header of this function is def loadGradesData$($self$).$ This function uses a loop to load grades in the file $($defined by $\_\_$filename attribute of the class$)$ to a list and return the list to the caller. Modify $\_\_$init$\_\_$ function to add one more data attribute $\_\_$gradesList$.$ Inside $\_\_$init$\_\_$ function, call $$loadGradesData$$ function and assign the returned value to $\_\_$gradesList$.$ Modify calculateAverage function to use the data attribute $\_\_$gradesList$$ to calculate average grades. Main function remains unchanged.