Program:

File name: “gpa_sort.py”

#Import required module

from gpa import Student

#Define the function make_Student()

def make_Student(info_Str):

    #Make multiple assignment

    Name, Hours, Gpoints = info_Str.split("\t")

    #Return constructor

    return Student(Name, Hours, Gpoints)

#Define the function read_Students()

def read_Students(file_name):

    #Open the input file for reading

    in_file = open(file_name, 'r')

    #Create an empty list

    Students = []

    #Create for loop to iterate over all lines in a file

    for line in in_file:

        #Append the line in a list

        Students.append(make_Student(line))

    #Close the input file

    in_file.close()

    #Return the list

    return Students

#Define the function write_Students()

def write_Students(Students, file_name):

    #Open output file to write

    out_file = open(file_name, 'w')

    #Create a for loop to iterate over list

    for s in Students:

        #Print output

        print("{0}\t{1}\t{2}".format(s[1],

        s[2], s[3]), file = out_file)

    #Close the output file

    out_file.close()

#Define the function

def sort(Students):

    #Create empty list

    new_Data = []

    #Create for loop

    for i in range(len(Students)):

        #Assign tuple

        x = (Students[i].gpa(), Students[i].get_Name(),

        Students[i].get_Hours(), Students[i].getQ_Points())

        #Append the data at the end of new list

        new_Data.append(x)

        #Call the function "sort()" to sort the data

        new_Data.sort()

        #Call the function "reverse()" to reverse the data

        new_Data.reverse()

    #Return new list

    return new_Data

#Define main() function

def main():

    #Print the string

    print("This program sorts student grade information by GPA")

    #Assign the file name

    file_name = "gpa1.txt"

    #Read the data from a file

    data = read_Students(file_name)

    #Sort the data

    data = sort(data)

    #Assign the file name

    file_name = "gpa_(sort1).txt"

    #Call the function

    write_Students(data, file_name)   

if __name__ == '__main__':

    #Call the main() function

    main()

File name: “gpa.py”

#Create a class Student

class Student:

    #Define _init_() method

    def __init__(self, Name, Hours, Gpoints):

        self.Name = Name

        self.Hours = float(Hours)

        self.Gpoints = float(Gpoints)

    #Define get_Name() method

    def get_Name(self):

        #Return the name

        return self.Name

    #Define get_Hours()

    def get_Hours(self):

        #return hours

        return self.Hours

    #Define getQ_Points()

    def getQ_Points(self):

        #return grade points

        return self.Gpoints

    #Define the function gpa()

    def gpa(self):

        #return the value

        return self.Gpoints / self.Hours

#Define the function make_Student()

def make_Student(info_Str):

    #Make multiple assignment

    Name, Hours, Gpoints = info_Str.split("\t")

   #Return the constructor

    return Student(Name, Hours, Gpoints)

#Define the main() function

def main():

    #Open the input file for reading

    file_name = input("Enter the name of the grade file: ")

    in_file = open(file_name, 'r')

    #Set best to the record for the first student in the file

    best = make_Student(in_file.readline())

    #Process lines of the file using "for" loop

    for line in in_file:

        #Make the line of file into a student record

        s = make_Student(line)

        #Checck whether the student is best so far

        if s.gpa() > best.gpa():

            #Assign the best student record

            best = s

    #Close the input file

    in_file.close()

    #Print information about the best student

    print("The best student is:", best.get_Name())

    print("Hours:", best.get_Hours())

    print("GPA:", best.gpa())

if __name__ == '__main__':

    #Call the main() function

    main()

Contents of “gpa1.txt”

Adams, Henry    127    228

Computewell, Susan    100    400

DibbleBit, Denny    18    41.5

Jones, Jim    48.5    155

Smith, Frank    37    125.33

Output:

This program sorts student grade information by GPA

>>>

Screenshot of output file “gps_(sort1).txt after execution: