Use of csv file and mulitiple inheritance demo

Dog.py

@@ -0,0 +1,53 @@
+import random
+
+class Dog:
+    def __init__(self, name, breed, FavActivity=None):
+        self.name = name
+        self.breed = breed
+        
+        self.initialSetFavFood()
+        
+        print(f"Woof!  I'm {self.name}, a {self.breed}")
+
+    def initialSetFavFood(self):
+        self.FavFood = random.choice(['chicken', 'beef', 'lamb', 'fish'])   
+        
+    def getFavoriteFood(self):
+        return self.FavFood 
+        
+    def setFavoriteFood(self, newFavFood):
+        if newFavFood == "chips":
+            print("This is not a suitable food for me!")
+        else:
+            self.FavFood = newFavFood
+            
+class Labrador(Dog):
+    def __init__(self, name):
+        super().__init__(name, "Labrador")
+        self.initialSetFavFood()
+        self.FavActivity = "running"
+        
+    def initialSetFavFood(self):
+        self.FavFood = random.choice(['rabbit', 'cat', 'lamb'])
+        
+    def setFavoriteActivity(self, newFavActivity):
+        self.FavActivity = newFavActivity
+              
+    def getFavActivity(self):
+        return self.FavActivity
+
+myLabrador = Labrador("Rex")
+myLabrador.setFavoriteFood("chips")
+
+
+print(f"My favorite food is {myLabrador.getFavoriteFood()} and my favorite activity is {myLabrador.getFavActivity()}") 
+
+class Bulldog(Dog):
+    def __init__(self, name):
+        super().__init__(name, "bulldog", "sleeping")   
+        self.initialSetFavFood()       
+        
+        
+                        
+        
+        

MyProductClass Enhanced.py

@@ -0,0 +1,80 @@
+import csv  
+
+class Product:
+    pay_rate = 0.8    # Class variable for a standard discount of 20%
+    all = []
+    def __init__(self, name, price, quantity):
+        assert price >= 0, f"Product price {price} is not greater than or equal to zero!"
+        assert quantity >= 0, f"Product quantity {quantity} is not greater than or equal to zero!"
+        self.name = name
+        self.price = price
+        self.quantity = quantity
+        
+        # Action to execute
+        Product.all.append(self)  # Store all instances in the class variable 'all'
+        
+    def calculate_total_price(self):
+        return self.price * self.quantity   
+    
+    def apply_discount(self):
+        return self.calculate_total_price() * (self.pay_rate)
+    
+    def __repr__(self):
+        return f"Product('{self.name}', {self.price}, {self.quantity})" 
+    
+    @classmethod
+    def instantiate_from_csv(cls):
+        with open('items.csv', 'r') as f:
+            reader = csv.DictReader(f)
+            items = list(reader)
+
+            for item in items:
+                try:
+                    name = item.get('name')
+                    price_str = item.get('price')
+                    quantity_str = item.get('quantity')
+                    
+                    if name is None or price_str is None or quantity_str is None:
+                        raise ValueError(f"Missing data in row: {item}")
+                    
+                    price = float(price_str)
+                    quantity = int(quantity_str)   
+                    
+                    Product(name, price, quantity)
+                    print(f"Created: {name}, ${price:.2f}, {quantity}")
+                    
+                except (TypeError, ValueError) as e:
+                    print(f"Skipping row due to error: {item} → {e}")
+
+
+# Example usage:
+if __name__ == "__main__":
+    
+    Product.instantiate_from_csv()   # Instantiate products from the CSV file 
+    print("All Products", Product.all)  # Print all instances stored in the class variable 'all'
+     
+ 
+'''
+    for instance in Product.all:
+        if instance.name in ["Smartphone", "Monitor", "Keyboard"]:
+            instance.pay_rate = 0.7  # Special discount of 30%
+        elif instance.name == "Tablet":
+            instance.pay_rate = 1.0  # No discount
+        else:
+            instance.pay_rate = 0.8  # Standard discount of 20%
+        
+        total_price = instance.calculate_total_price()
+        discounted_price = instance.apply_discount()
+        
+        print(f"Product: {instance.name}, Total Price: ${total_price:.2f}, Price after Discount: ${discounted_price:.2f}")  
+        
+        print(repr(instance))  # Print the formal representation of the instance 
+    print(Product.all)  # Print all instances stored in the class variable 'all'
+'''      
+
+
+    
+    
+    
+   
+   

items.csv

@@ -0,0 +1,9 @@
+name,price,quantity
+"apple",0.50,100    
+"banana",0.30,150
+"orange",0.80,200
+"grape",2.00,50
+"mango",1.50,75
+"kiwi",1.20,60
+"peach",1.00,80
+

mult_inheritance.py

@@ -0,0 +1,23 @@
+class Flyable:
+    def fly(self):
+        return "Flying high!"
+
+class Swimmable:
+    def swim(self):
+        return "Swimming deep!"
+
+class Duck(Flyable, Swimmable):  
+    def __init__(self, name):
+        self.name = name    
+
+d = Duck("Donald")
+print(f"{d.name} is {d.fly()} and {d.swim()}")
+
+# Output:
+# Donald is Flying high! and Swimming deep! 
+
+# Demonstrates multiple inheritance where Duck inherits from both Flyable and Swimmable classes.
+# The Duck class can use methods from both parent classes.  
+# The order of inheritance matters; methods are resolved in the order of the base classes listed.
+# In this case, Flyable is checked before Swimmable for method resolution.  
+