Grocery shopping Algorithm.txt

# Grocery shopping purchase algorithm. 
# Rage with the machine... 
#This algorithm:
#1. takes a grocery item and price.
#2. Evaluates if it is perishable or non perishable.
#3. If non perishable and the item is below the normal price calculates and returns the excess amount to purchase.
#4. If perishable and above normal price returns a do not purchase statement.
#5. If non perishable and above the normal price returns a do not purchase statement.
#6. If perishable and below the normal price returns a purchase statement.   

import math

print('Please type the name of the item')
x = input()
x = str(x)
print('Please type the cost of the item in pence per kg')
priceX = input()
priceX = int(priceX)
#List of items
P = ["Eggs","Milk", "White potatoes", "Carrots", "Cherry Tomatoes", "Mushrooms", "Lemons"]
NP = ["Oats", "Pasta", "Baked Beans", "Earl grey", "Orange Juice", "Plain Flour", "Extra Virgin Olive Oil", "Rice",
"Tinned Tomatoes", "Sundried Tomatoes", "Salted Butter", "Dried Yeast", "Chicken Breast", "Marmite","Cheese", "Green Olives"]
#Price look up 
Pdict = {
  "Eggs": 120,
  "Milk": 52,
  "White potatoes": 67,
  "Carrots": 40,
  "Cherry tomatoes": 200,
  "Mushrooms": 396,
  "Lemons": 0,
}
NPdict = {
  "Oats": 75,
  "Pasta": 140,
  "Baked Beans": 100,
  "Earl Grey": 100,
  "Orange Juice": 81,
  "Plain flour": 30,
  "Chicken Breast": 579,
  "Extra Virgin Olive Oil": 0,
  "Rice": 0,
  "Tinned Tomatoes": 141,
  "Sundried Tomatoes": 614,
  "Salted Butter": 592,
  "Dried Yeast": 1551,
  "Marmite": 0,
  "Cheese": 442,
  "Green Olives": 376,
}
#Price lookup comapared to normal expense 
NPdict2 = {
  "Oats": 52,
  "Pasta": 52,
  "Baked Beans": 208,
  "Earl Grey": 78,
  "Orange Juice": 12,
  "Plain flour": 52,
  "Chicken Breast": 4,
  "Extra Virgin Olive Oil": 52,
  "Rice": 104,
  "Tinned Tomatoes": 208,
  "Sundried Tomatoes": 12,
  "Salted Butter": 52,
  "Dried Yeast": 26,
  "Marmite": 52,
  "Cheese": 26,
  "Green Olives": 52,
} 

if x in P and ((priceX-Pdict[x]) > 0 ) :
  print("Buy Substitute or Delay Purchase")

elif x in NP and ((priceX-NPdict[x]) > 0):
    print("Delay")
    
elif x in NP and (priceX-NPdict[x]) <= 0 :
    y = (NPdict[x]/priceX)
    r = y**3      
    print("Buy", int(r), "times usual amount Maximum", NPdict2[x]) 
    
elif x in P and ((priceX-Pdict[x]) <= 0 ) :
  print("Buy item as usual ")