Question & Answer: Write a program that keeps a dictionary in which both keys and values are strings – names of students and their course grades. Your program should prompt the…..

Python Program:

def menu():
“”” Displays menu to user “””

# Printing menu
print(“nn Select an option: n   [1] Add Student Grade n   [2] Remove Student Grade n   [3] Modify Student Grade n   [4] Display All Student Grades n   [5] Exit n”);

# Accepting user input
ch = int(input(“n Enter selection: “));

return ch;
def addGrade(studentGrades):
“”” Function that adds student grades “””

print(“nn –Add Student– “);

# Accepting user input
name = input(“n   Enter Name: “);
grade = input(”   Enter Grade: “);

# Adding to dictionary
studentGrades[name] = grade;

print(“n   Student Successfully Added! n”);
def removeGrade(studentGrades):
“”” Function that removes student grade “””

print(“nn –Remove Student– “);

# Accepting user input
name = input(“n   Enter Name: “);

# Checking for existence
if name in studentGrades.keys():
# Deleting student
del studentGrades[name];
print(“n Successfully Removed ‘%s’ n” %(name));

else:
print(“n Student ‘%s’ not found!!! n” %(name));

def modifyGrade(studentGrades):
“”” Function that updates student grade “””

print(“nn –Modify Student Grade– “);

# Accepting user input
name = input(“n   Enter Name: “);
grade = input(”   Enter Grade: “);

# Checking for existence
if name in studentGrades.keys():
# Deleting student
studentGrades[name] = grade;
print(“n Successfully Updated ‘%s’ n” %(name));

else:
print(“n Student ‘%s’ not found!!! n” %(name));
def displayGrades(studentGrades):
“”” Function that displays student grades “””

print(“nn –Displaying All Students– “);

# Iterating over dictionary
for name in studentGrades.keys():
# Printing student
print(“n %s: %s” %(name, studentGrades[name]));

def main():
“”” Main function “””

# Dictionary to hold items
studentGrades = {};

# Iterate till user want to quit
while True:

# Displaying menu
ch = menu();

# Calling appropriate functions
if ch == 1:
addGrade(studentGrades);
elif ch == 2:
removeGrade(studentGrades);
elif ch == 3:
modifyGrade(studentGrades);
elif ch == 4:
displayGrades(studentGrades);
elif ch == 5:
return;
else:
print(“n Invalid choice…. n”);

# Calling main function
main();

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