Learning Goals

use a dictionary to store items$/$options

use a function to print formatted 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 set of options.

Let's say our high$-$level options are as follows:

dots$=\{\text{'}L\text{'}$: 'List orders',

$\text{'}O\text{'}$: 'Order a ticket',

$\text{'}C\text{'}$: 'Compute statistics',

$\text{'}Q\text{'}$: 'Quit this program'$\}$

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

print$\_$options $()$ function

Write the print$\_$options $()$ that accepts a dictionary of keys$-$options like the one shown above and prints the options stored in that

dictionary in an easy$-$to$-$read format.

Do not hard$-$code this dictionary in your function $-$ use the provided parameter instead.Example

Given the following options as shown above, the call to the print$\_$options $(...)$ will output $($note the space before the option key$)$:

L $-$ List orders

o $-$ order a ticket

C $-$ Compute statistics

Q $-$ Quit this program

Program flow

The expected program flow is:

The main program starts with the options given above

Loop indefinitely $($while the user didn't choose to exit$)$:

Print the options to the user

Get the user's choice from input $()$

Check if the user's choice is a valid option $($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 $\text{'}$Q$\text{'},$ break the while loopFix the TODOs in the following template:

def print$\_$options$(...)$:

$"""$

Given a dictionary, print the keys

and values as the formatted options:

$\{$key