
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
In Python:
Write a program that performs the following:
- Defines two sets s1, and s2, where each of them contain the following:
s1 = {1,2,4,5,6}
s2= {1,3,4,7}
- Provides a menu with the following options:
- Union
- Intersection
- Difference
- Symmetric difference
- Display sets
- Exit
The program stops once the user enters 6 (chooses to exit). When the user selects any of the other options, the corresponding operation is performed and the result is displayed. Please refer to the attached code which contains an example on how to implement a menu.
Notes:
- I will leave the code organization for you, at this stage, you should be able to organize your program into functions in a proper way
- For the third operation (difference) find s1-s2. For the remaining operations it does not matter (for example, s1 union s2 is same s2 union s1)

Transcribed Image Text:# Process the choice.
if choice
#do what you need to do for this option
ΟΡΤΙΟN 1 :
==
elif choice
ΟPTION2 :|
==
#do what you need to do for this option
elif choice
ΟΡΤΙΟN 3:
==
#do what you need to do for this option
elif choice
#do what you need to do for this option
ΟΡΤΙΟN 4 :
==
# The get menu choice function displays the menu
# and gets a validated choice from the user.
def get menu choice () :
print()
print('Menu')
print('-
print('1. whatever you have to do in this option')
print('2. whatever you have to do in this option')
print('3. whatever you have to do in this option')
print('4. whatever you have to do in this option')
print('5. Quit the program')
print()
')
# Get the user's choice.
choice
int(input ('Enter your choice: '))
# Validate the choice.
while choice < OPTION1 or choice > QUIT:
choice
int(input ('Enter a valid choice: '))
# return the user's choice.
return choice
# Call the main function.
main ()

Transcribed Image Text:# Global constants for menu choices, YOU MAY CONSIDER CHANGING THE OPTIONS
# ACCORDING TO WHAT YOU NEED TO DO IN THE MENU
ΟΡTΙΟN1
1
ΟPTION2
2
OPTION3= 3
ΟΡTION4= 4
QUIT
5
# main function
def main ():
# Initialize a variable for the user's choice.
choice = 0
# Process menu selections until the user
# wants to quit the program.
while choice != QUIT:
# Get the user's menu choice.
choice
get_menu choice()
# Process the choice.
if choice
#do what you need to do for this option
elif choice
#do what you need to do for this option
ΟΡΤΙΟN 1 :
==
ΟΡΤΙΟN2 :
==
elif choice
ΟΡΤΙΟN 3:
==
#do what you need to do for this option
elif choice
ΟΡΤΙΟN 4 :
==
#do what you need to do for this option
# The get menu choice function displays the menu
# and gets a validated choice from the user.
def get menu choice ():
print()
print('Menu')
print('-
print('1. whatever you have to do in this option')
print('2. whatever you have to do in this option')
print('3. whatever you have to do in this option')
print('4. whatever you have to do in this option')
print('5. Quit the program')
print()
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