Learning Goals use a dictionary to store menu items use a function to print formatted menu options use a while loop to create an interactive program check the user input using if branches check that an option is correct (verify that a dictionary key exists) use break to interrupt the program execution Introduction In this lab, we will be building an application that uses an interactive menu. Let's say our high-level menu has the following options: L : List A : Add E : Edit D : Delete M: Show statistical data S : Save the data R : Restore data from file Q : Quit this program These key-option mappings will be stored in a dictionary in the main program. print_main_menu() function Write the print_main_menu() that accepts a dictionary of keys-options like the one shown above and prints the menu options stored in that dictionary in an easy-to-read format. Below is an example of the result of calling print_main_menu() (notice the question it asks at the top - it is part of the function output): Example Given the menu with the following options as mentioned above, the call to print_main_menu(main_menu) will output: ========================== What would you like to do? L - List A - Add E - Edit D - Delete M - Show statistical data S - Save the data R - Restore data from file Q - Quit this program ========================== Program flow The expected program flow is: The main program starts with a menu of options given above Loop indefinitely (while the user didn't choose to exit): Print the menu to the user Get the user's choice from input() Check if the user's choice is a valid option in the menu (is it one of the dictionary keys?). If the input is a valid option, print the option that user selected If not, simply continue from the top of the loop If the user entered 'Q', break the while loop Instructions Fix TODO 1: Add the options from the instructions to the_menu dictionary inside the main program. Fix TODO 2: Implement the "Quit" option, breaking from the while loop if the user input is an uppercase OR lowercase "Q". Fix TODO 3: Check whether a provided option is a valid menu option. Each time a valid menu option is provided, the program "echoes" it back to the user as follows: print(f"You selected option {opt} to > {the_menu[opt]}.") Hints Make sure you do not hard-code the menu options in your functions - the options need to be retrieved from the dictionary provided as a parameter to the function. Please use Python def print_main_menu(menu): """ Given a dictionary with the menu, prints the keys and values as the formatted options. Adds additional prints for decoration and outputs a question "What would you like to do?" """ if __name__ == "__main__": the_menu = {} # TODO 1: add the options from the instructions opt = None while True: # print_main_menu(...) # TODO 1: uncomment, define the function, and call with the menu as an argument print("::: Enter an option") opt = input("> ") if opt == ...: # TODO 2: make Q or q quit the program print("Goodbye!\n") break # exit the main `while` loop else: if ...: # TODO 3: check of the character stored in opt is in the_menu dictionary print(f"You selected option {opt} to > {the_menu[opt]}.") else: print(f"WARNING: {opt} is an invalid option.\n")

Learning Goals use a dictionary to store menu items use a function to print formatted menu options use a while loop to create an interactive program check the user input using if branches check that an option is correct (verify that a dictionary key exists) use break to interrupt the program execution Introduction In this lab, we will be building an application that uses an interactive menu. Let's say our high-level menu has the following options: L : List A : Add E : Edit D : Delete M: Show statistical data S : Save the data R : Restore data from file Q : Quit this program These key-option mappings will be stored in a dictionary in the main program. print_main_menu() function Write the print_main_menu() that accepts a dictionary of keys-options like the one shown above and prints the menu options stored in that dictionary in an easy-to-read format. Below is an example of the result of calling print_main_menu() (notice the question it asks at the top - it is part of the function output): Example Given the menu with the following options as mentioned above, the call to print_main_menu(main_menu) will output: ========================== What would you like to do? L - List A - Add E - Edit D - Delete M - Show statistical data S - Save the data R - Restore data from file Q - Quit this program ========================== Program flow The expected program flow is: The main program starts with a menu of options given above Loop indefinitely (while the user didn't choose to exit): Print the menu to the user Get the user's choice from input() Check if the user's choice is a valid option in the menu (is it one of the dictionary keys?). If the input is a valid option, print the option that user selected If not, simply continue from the top of the loop If the user entered 'Q', break the while loop Instructions Fix TODO 1: Add the options from the instructions to the_menu dictionary inside the main program. Fix TODO 2: Implement the "Quit" option, breaking from the while loop if the user input is an uppercase OR lowercase "Q". Fix TODO 3: Check whether a provided option is a valid menu option. Each time a valid menu option is provided, the program "echoes" it back to the user as follows: print(f"You selected option {opt} to > {the_menu[opt]}.") Hints Make sure you do not hard-code the menu options in your functions - the options need to be retrieved from the dictionary provided as a parameter to the function. Please use Python def print_main_menu(menu): """ Given a dictionary with the menu, prints the keys and values as the formatted options. Adds additional prints for decoration and outputs a question "What would you like to do?" """ if name == "main": the_menu = {} # TODO 1: add the options from the instructions opt = None while True: # print_main_menu(...) # TODO 1: uncomment, define the function, and call with the menu as an argument print("::: Enter an option") opt = input("> ") if opt == ...: # TODO 2: make Q or q quit the program print("Goodbye!\n") break # exit the main `while` loop else: if ...: # TODO 3: check of the character stored in opt is in the_menu dictionary print(f"You selected option {opt} to > {the_menu[opt]}.") else: print(f"WARNING: {opt} is an invalid option.\n")

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

Problem 1PE

See similar textbooks

Learning Goals

use a dictionary to store menu items
use a function to print formatted menu options
use a while loop to create an interactive program
check the user input using if branches
check that an option is correct (verify that a dictionary key exists)
use break to interrupt the program execution

Introduction

In this lab, we will be building an application that uses an interactive menu.

Let's say our high-level menu has the following options:

L : List A : Add E : Edit D : Delete M: Show statistical data S : Save the data R : Restore data from file Q : Quit this program

These key-option mappings will be stored in a dictionary in the main program.

print_main_menu() function

Write the print_main_menu() that accepts a dictionary of keys-options like the one shown above and prints the menu options stored in that dictionary in an easy-to-read format. Below is an example of the result of calling print_main_menu() (notice the question it asks at the top - it is part of the function output):

Example

Given the menu with the following options as mentioned above, the call to print_main_menu(main_menu) will output:

========================== What would you like to do? L - List A - Add E - Edit D - Delete M - Show statistical data S - Save the data R - Restore data from file Q - Quit this program ==========================

Program flow

The expected program flow is:

The main program starts with a menu of options given above
Loop indefinitely (while the user didn't choose to exit):
- Print the menu to the user
- Get the user's choice from input()
- Check if the user's choice is a valid option in the menu (is it one of the dictionary keys?).
  - If the input is a valid option, print the option that user selected
  - If not, simply continue from the top of the loop
- If the user entered 'Q', break the while loop

Instructions

Fix TODO 1: Add the options from the instructions to the_menu dictionary inside the main program.
Fix TODO 2: Implement the "Quit" option, breaking from the while loop if the user input is an uppercase OR lowercase "Q".
Fix TODO 3: Check whether a provided option is a valid menu option.

Each time a valid menu option is provided, the program "echoes" it back to the user as follows:

print(f"You selected option {opt} to > {the_menu[opt]}.")

Hints

Make sure you do not hard-code the menu options in your functions - the options need to be retrieved from the dictionary provided as a parameter to the function.

Please use Python

def print_main_menu(menu):
"""
Given a dictionary with the menu,
prints the keys and values as the
formatted options.
Adds additional prints for decoration
and outputs a question
"What would you like to do?"
"""

if __name__ == "__main__":
the_menu = {} # TODO 1: add the options from the instructions
opt = None

while True:
# print_main_menu(...) # TODO 1: uncomment, define the function, and call with the menu as an argument
print("::: Enter an option")
opt = input("> ")

if opt == ...: # TODO 2: make Q or q quit the program
print("Goodbye!\n")
break # exit the main `while` loop
else:
if ...: # TODO 3: check of the character stored in opt is in the_menu dictionary
print(f"You selected option {opt} to > {the_menu[opt]}.")
else:
print(f"WARNING: {opt} is an invalid option.\n")

4:Compare output - Quit ^
Output differs. See highlights below. Special character legend
Input
Your output
Expected output
What would you like to do?
L : List
A : Add
U : Update
D: Delete
S Save the data
R
Q: Quit this program
::: Enter an option
> Goodbye!
What would you like to do?
L List
A - Add
E Edit
HA
Restore data from file
D Delete
-
M
S Save the data
R
Show statistical data
Restore data from file
Quit this program
::: Enter an option
> Goodbye!
0/1

Expected output
What would you like to do?
L
List
A - Add
E
D
M
S
R
Q
Edit
Delete
Show statistical data
Save the data
Restore data from file
Quit this program
::: Enter an option
> You selected option L to > List.
What would you like to do?
L - List
A - Add
HANAMS
Edit
D - Delete
M Show statistical data
Save the data
R Restore data from file
Quit this program
::: Enter an option
> Goodbye!
2:Compare output - One of the options
Results hidden by your instructor
3:Compare output - One of the options
Results hidden by your instructor
0/2
0/1

Expert Solution

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.