Finding items in a list along with their price in Python-CodePudding

Python code to find items

Price_list = ["01", "Banana", 5.00, "unit", "02", "Mango", 20.00, "kg", 
              "03", "Apple", 15.00, "kg", "04", "Papaya", 25.00, "unit", 
              "05", "Guava", 15.00, "kg"]

print( ("Price List:"))
print( ("-----------"))
print("Item no  Item name  Price  Unit")
for i in range(0, 20, 4):
    # This is the correct one because this can access all the items in the list.
    print("{0:7} {1:9} {2:5} {3:4)".format(Price_list[i],
          Price_list[i 1], Price_list[i 2], Price_list[i 3]))

Here, I want to write a code that gives me the name and price of the fruit present in the list after asking the input i.e., name of the fruit from the user.

CodePudding user response：

This code works :-

price_list = ["01","Banana", 5.00, "unit", "02", "Mango", 20.00, "kg", "03", "Apple", 15.00, "kg", "04", "Papaya", 25.00, "unit", "05", "Guava", 15.00, "kg"]

fruit = input("Enter fruit name: ").lower().capitalize()
fruit_index = price_list.index(fruit)

print(f"{fruit} is ${price_list[fruit_index 1]} per {price_list[fruit_index 2]}")

CodePudding user response：

A flat list can work for that kind of query - you could get the index of a fruit and add/subtract to it to get its correspondig values. It may be better to wrangle your data into a better data structure/shape though:

# flat list
items = ["01","Banana", 5.00, "unit", "02", "Mango", 20.00, "kg", 
         "03", "Apple", 15.00, "kg", "04", "Papaya", 25.00, "unit", 
         "05", "Guava", 15.00, "kg"]

# order of data headers inside items
headers = ["Number","Name","Price","Unit"]

# transform your data to something you can work with
i = {items[pos 1] : dict(zip(headers, items[pos:pos 4])) 
     for pos in range(0,len(items),len(headers))}

# this will create this dictionary
# {'Banana': {'Number': '01', 'Name': 'Banana', 'Price':  5.0, 'Unit': 'unit'}, 
#  'Mango':  {'Number': '02', 'Name': 'Mango',  'Price': 20.0, 'Unit': 'kg'}, 
#  'Apple':  {'Number': '03', 'Name': 'Apple',  'Price': 15.0, 'Unit': 'kg'}, 
#  'Papaya': {'Number': '04', 'Name': 'Papaya', 'Price': 25.0, 'Unit': 'unit'}, 
#  'Guava':  {'Number': '05', 'Name': 'Guava',  'Price': 15.0, 'Unit': 'kg'}}

what = input(f"What do you want? [{(', '.join(i))}] ")

# get the item or a default result dictionary with "out" in it
w = i.get(what, {"Number":"out", "Name":what, "Price":"out", "Unit": "None"})

# print it
print(w["Name"], "=>", w["Price"])

Output:

What do you want? [Banana, Mango, Apple, Papaya, Guava] Appleees
Appleees => out

What do you want? [Banana, Mango, Apple, Papaya, Guava] Mango
Mango => 20.0