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2- Create Python file to allow the Digital Library Website projects to select one of the web pages in the website (A: Books

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Answer #1

Python Code for the above problem:

import sys #Importing sys module for terminating the execution

def function(choice):
if choice == "a" or choice == "A": #If the user enters "a" or "A"
return "\t\t\t Welcome to Books Online \n" #Return the string "Welcome to Books Online"
  
  
elif choice == "b" or choice == "B": #If the user enters "b" or "B"
return "\t\t\t Welcome to Collections \n" #Return the string "Welcome to Collections"
  
elif choice == "c" or choice == "C": #If the user enters "c" or "C"
return "\t\t\t Welocme to Research \n" #Return the string "Welcome to Research"
  
  
elif choice == "q" or choice == "Q": #If the user enters "q" or "Q"
sys.exit() #Terminating the execution using "sys" module
  

def main():
while True: #This is an infinite loop
print("\t************ Welcome to Digital Library Web Site ************ \n")
print("\t\t\t\t A: Books Online \n") #Printing the options for the user
print("\t\t\t\t B: Collections \n")
print("\t\t\t\t C: Research \n")
print("\t\t\t\t Q: Log Out or Quit\n")
choice = input("\t\t\tPlease enter your choice: ") #Prompting the user to enter his/her choice
print()
print(function(choice)) #Calling the function to process the request
  
  
main() #Calling out main function


CODE IMPLEMENTATION:

File Edit Format Run Options Window Help import sys #Importing sys module for terminating the execution def function (choice)CODE IMPLEMENTATION OUTPUT (1):

*** Welcome to Digital Library Web Site A: Books Online B: Collections C: Research Q: Log Out or Quit Please enter your choicCODE IMPLEMENTATION OUTPUT (2):

What if the user enters the option "Q":

*** Welcome to Digital Library Web Site ** A: Books Online B: Collections C: Research Q: Log Out or Quit Please enter your chi.e., When the user enters "Q" The program execution will terminate..Oterwise the program goes on prompting the user to enter his/her choice...

NOTE:

# Be aware of the indentation by observing the above uploaded CODE pictures.

# I have used sys.exit() statement to stop the execution when the user enters the input as "Q"

# Or else we can just put a break statement in the while loop to stop execution.


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