In python, take in a code as an order, check if the code is valid, check if the item is still in stock, remove one item from the inventory, add the cost of the item to to the total bill and return the order and total cost.

Given code:

import pandas as pd

# create a dictionary of our menu items, including a short code, the item name, the cost, and the number remaining in stock.

inventory $=\{$ 'code' : $[\text{'}$h$\text{'},\text{'}$c$\text{'},\text{'}$f$\text{'},\text{'}$p$\text{'},\text{'}$m$\text{'}],$

'item' : $[\text{'}$hamburger$\text{'},$ 'cheeseburger', 'fries', 'pepsi', 'milkshake'$],$

'cost' : $[\mathrm{.}4,\mathrm{.}5,\mathrm{.}3,\mathrm{.}3,1],$

'remain' : $[100,50,200,200,25]$

$\}$

# create the dataframe from our dictionary

df $=$ pd$.$DataFrame$($data$=$inventory, index$=$inventory$[\text{'}$code$\text{'}],$ columns $=[\text{'}$item$\text{'},$ 'cost','remain'$])$

def order$($df$)$:

menu$\_$item $=$ True

total$\_$cost $=0\mathrm{.}0$

this$\_$order $=[]$

while menu$\_$item $==$ True:

# print the menu and short keys

print$($df$[$df$[\text{'}$remain$\text{'}]>0])$

# take in a code as an order

menu$\_$item $=$ input$("$Select from the menu $[$Enter to be done$]>")$

# check if the code is valid

# check if the item is still in stock

# remove one item from the inventory

# add the cost of the item ot the total bill

# return the total cost and the order

return

order$($df$)$