iteminfo.py

"""Define a class named ItemInfo with the following description:

item_code(Item Code), item(item name), price(Price of each item), qty(quantity in stock), discount(Discount percentage on the item), net_price(Price after discount)

Methods :

A member method calculate_discount() to calculate discount as per the following rules:
If qty <= 10 —> discount is 0
If qty (11 to 20 inclusive) —> discount is 15
If qty >= 20 —> discount is 20
A constructor init method to assign the initial values for item_code to 0 and price, qty, net_price and discount to null
A function called buy() to allow user to enter values for item_code, item, price, qty. Then call function calculate_discount() to calculate the discount and net_price(price * qty - discount).
A function show_all() or similar name to allow user to view the content of all the data members.
"""
class ItemInfo:
        def __init__(self):
                self.item_code=0
                self.item=''
                self.price=0
                self.qty=''
                self.discount=0
                self.net_price=0
                self.buy()
        
        def buy(self):
                self.item_code = int(input("Enter item code: "))
                self.item = input("Enter item name: ")
                self.price = float(input("Enter price: "))
                self.qty = int(input("Enter quantity: "))
                self.calculate_discount()
        
        def calculate_discount(self):
                if self.qty <= 10:
                        self.discount=0
                        self.net_price=self.price * self.qty - self.discount
                elif 10 <= self.qty < 20:
                        self.discount=15
                        self.net_price=self.price * self.qty - self.discount
                elif 20 <= self.qty :
                        self.discount=20
                self.show_all()
                        
        def show_all(self):
                print(f"Item Code: {self.item_code},Item Name: {self.item},Price:{self.price},Item Quantity: {self.qty},Discount: {self.discount},Net Price: {self.price * self.qty - self.discount}")

A= ItemInfo()
A.buy()
A.show_all()