Lab0x01

Files
file	Vendotron.py
	Runs a vending machine emulator in the terminal.

Classes
class	Vendotron.Drink
	A small struct representing a drink. More...
class	Vendotron.Currency
	A small struct representing a denomination of US currency. More...
class	Vendotron.State
	The current state of the Vendotron. More...

Functions
def	Vendotron.display (message)
	Display a Vendotron message in a pretty format. More...
def	Vendotron.get_change (price, payment)
	Calculate the change required based on a given payment. More...
def	Vendotron.handle_key (key)
	Catch a key press and do the appropriate action. More...
def	Vendotron.main ()
	Entry point for the Vendotron program. More...

Variables
dictionary	Vendotron.drinks
	A dictionary of all drinks in the machine. More...

Detailed Description

Function Documentation

display()

def Vendotron.display

(

message

)

Display a Vendotron message in a pretty format.

Parameters

message

The message to be displayed

get_change()

def Vendotron.get_change	(		price,
			payment
	)

Calculate the change required based on a given payment.

Parameters

price	A price in USD, expressed as a real number divisible by 0.01
payment	A dictionary containing the amount of each denomination that was paid. Keys are the denomination value and Values are the frequency of said denomination.

Returns

A dictionary of the same form as payment containing exact change in the fewest possible number of items

handle_key()

def Vendotron.handle_key

(

key

)

Catch a key press and do the appropriate action.

0-7: insert a currency of one of these denominations:

• 0 - penny
• 1 - nickle
• 2 - dime
• 3 - quarter
• 4 - 1 dollar bill
• 5 - 5 dollar bill
• 6 - 10 dollar bill
• 7 - 20 dollar bill c, p, s, d: select a drink from drinks e eject the current balance q terminate the program

main()

def Vendotron.main

(

)

Entry point for the Vendotron program.

Run the Vendotron program, first displaying a welcome message and then responding to user actions. If the user hasn't pressed any buttons in a while (30s), display a random slogan. For user actions see handle_key . Also accepts CTRL+c to terminate the program swiftly.

Variable Documentation

drinks

dictionary Vendotron.drinks

Initial value:

=  {'c': Drink('Cuke', 1.00),
          'p': Drink('Popsi', 1.20),
          's': Drink('Spryte', 0.85),
          'd': Drink("Dr. Pupper", 1.10)}

A dictionary of all drinks in the machine.

Keys are the keyboard key that triggers this drink. Values are drink objects.