main() will call create() and then call retrieve() create() will prompt the user to enter any number of course name / grade pairs and write them to a file named grades.txt. Pressing Enter with no input value on the course name will exit the loop, close the file, print "File was created and closed" and return the bool value True to the main() retrieve()  will open and read grades.txt.   The function then will print the course names and scores as shown below. The average score should be calculated as well as a simple GPA and displayed  to two decimal places and then return variable used for the GPA to the main() . See sample run below in which 4 course names were entered, but note that more or fewer courses could have been entered.   Enter course name or Enter to quit:  CPO1000                                                                                                                              Enter grade (integer) achieved: 96                                                                                                                                       Enter Enter course name or Enter to quit: MAT2100                                                                                                                Enter grade (integer) achieved:77                                                                                                                                                Enter course name or Enter to quit: PHY 2200                                                                                                                      Enter grade (integer) achieved:79                                                                                                                                             File was created and closed Here are your grades:     (no spaces between lines)                                                                                  CPO1000 score is 96  MAT2100 score is 77                                                                                                                                                        PHY2200 score is 79                                                                                                                                                             Average grade among your courses is 84.00 Your GPA is 2.67

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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main() will call create() and then call retrieve()

create() will prompt the user to enter any number of course name / grade pairs and write them to a file named grades.txt. Pressing Enter with no input value on the course name will exit the loop, close the file, print "File was created and closed" and return the bool value True to the main()

retrieve()  will open and read grades.txt.

 

The function then will print the course names and scores as shown below. The average score should be calculated as well as a simple GPA and displayed  to two decimal places and then return variable used for the GPA to the main() . See sample run below in which 4 course names were entered, but note that more or fewer courses could have been entered.

 

Enter course name or Enter to quit:  CPO1000                                                                                                                              Enter grade (integer) achieved: 96                                                                                                                                      

Enter Enter course name or Enter to quit: MAT2100                                                                                                                Enter grade (integer) achieved:77                                                                                                                                                Enter course name or Enter to quit: PHY 2200                                                                                                                      Enter grade (integer) achieved:79                                                                                                                                             File was created and closed

Here are your grades:     (no spaces between lines)                                                                                 

CPO1000 score is 96 

MAT2100 score is 77                                                                                                                                                       

PHY2200 score is 79                                                                                                                                                            

Average grade among your courses is 84.00 Your GPA is 2.67

I have the following code , I am having trouble with the rest.


def create():

#open the file

grades_file = open('grades.txt','w')

while True:

course_name = input("Enter course name or Enter to quit: ")

#Storing the values

if course_name == '':

print("File was created and closed")break

 

grade = int(input("Enter grade (integer) achieved: "))
grades_file.write(course_name+'\n')
grades_file.write(str(grade)+'\n')

 

#close the file

 

grades_file.close()

 

return True

 

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