W5.Solutions

Q1_society_allocation.py

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+"""Create the class Society with following information:
+society_name, house_no, no_of_members, flat, income
+Methods :
+1)An __init__ method to assign initial values of society_name, house_no, no_of_members, income
+2)allocate_flat() to allocate flat according to income using the below table -> according to income, 
+it will decide to flat type
+3)show_data() to display the details of the entire class.
+4)Create one object for each flat type, for each object call allocate_flat() and show_data()
+Income	            Flat
+>=25000             A Type
+>=20000 and <25000  B Type
+>=15000 and <20000  C Type  
+<15000	            D Type"""
+
+class Society:       #We define initial values of society_name, house_no, no_of_members, income
+    def __init__(self,society_name, house_no, no_of_members, income):
+       self.society_name = society_name
+       self.house_no=house_no
+       self.no_of_members=no_of_members
+       self.income=income
+
+    def allocate_flat(self):       #We define allocation types,according to income
+        if self.income>=25000:
+            self.flat='A Type'
+        elif 20000<=self.income <25000:
+            self.flat='B Type'
+        elif 15000<=self.income<20000:
+            self.flat='C Type'
+        elif self.income<15000 :
+            self.flat='D Type'
+        return self.flat
+
+    def show_data(self):      #We display details of entire class
+        print(f"""
+Society Name:{self.society_name} 
+House_No : {self.house_no} 
+Number of Members: {self.no_of_members}
+Income : {self.income}
+Allocation : {self.allocate_flat()}""",end="\n  ---->")
+
+Ex_1=Society("Red",4,6,15000)
+Ex_2=Society("Teal",3,5,40000)
+Ex_3=Society("Black",1,1,8000)
+Ex_4=Society("White",11,2,23000)
+Ex_1.show_data()
+Ex_2.show_data()
+Ex_3.show_data()
+Ex_4.show_data()
+

Q2_shopping.py

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+"""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."""
+
+
+
+
+
+
+#We assign startup values to call after to calculate
+class ItemInfo:  
+    def __init__(self,item_code=0,item=None,price=None,qty=None,net_price=None,discount=None) : 
+        self.item_code=item_code #Item Code
+        self.item=item           #item name
+        self.price=price         #Price of each item
+        self.qty=qty             #Quantity in Stock
+        self.net_price=net_price #Discount percentage on the item 
+        self.discount=discount   #Price After Discount
+
+    def calculate_discount(self): #This func calculate amount of discount
+        if self.qty<=10:
+           self.discount=0
+        elif 11<=self.qty<=20:
+           self.discount=15
+        elif self.qty>=20:
+           self.discount=20
+        return self.discount
+
+    def buy(self):               #This func generates net price of items
+        self.item_code=int(input("Enter item code :"))
+        self.item=input("Enter Item Name :")
+        self.price=int(input("Enter price of item :"))
+        self.qty=int(input("Enter quantity of items :"))
+        self.calculate_discount()
+        self.net_price=(self.price * self.qty-self.discount)
+        return self.net_price
+
+    def show_all(self):   #This will display the content of all the data members to user .
+      print(f"""Item Code: {self.item_code}
+Item Name: {self.item}
+Price : {self.price}
+Quantity : {self.qty}
+Discount : {self.calculate_discount()}
+Net Price : {self.net_price}""")
+
+
+Ex=ItemInfo()
+Ex.buy()
+Ex.calculate_discount()
+Ex.show_all()

Q3_numbers.py

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+"""Create a class called Numbers, which has a single class attribute called multiplier, and a constructor which takes the parameters x and y (these should all be numbers).
+
+Write a method called add which returns the sum of the attributes x and y.
+Write a class method called multiply, which takes a single number parameter a and returns the product of a and multiplier.
+Write a method called subtract, which takes two number parameters, b and c, and returns b - c.
+Write a method called value which returns a tuple containing the values of x and y.
+Create a numbers object and call all the methods you wrote and print the results."""
+
+
+class Numbers:
+    multiplier = 1.5         #we assign class attribute as 1.5
+
+    def __init__(self, x, y):
+        self.x = x
+        self.y = y
+
+    def add(self):           #returns the sum of the attributes x and y.
+        return self.x + self.y
+
+    def multiply(self, m):   #returns multiply m by class attribute(1.5)
+        return self.multiplier* m
+
+    def value(self):         #converts x,y to tuple(x,y)
+        return (self.x,self.y)
+
+    def subtract(self,b, c): #we assign new parameters,these take another values than x,y.
+        self.b=b
+        self.c=c
+        return b - c
+#m,b,c are not assigned at __init_  intentionally.
+numbers=Numbers(5,10)
+print("The sum of the attributes x and y: %d"%(numbers.add()))
+print("The substract : %d"%numbers.subtract(2,3))
+print("The multiplied by (1.5): %d"%numbers.multiply(2))
+print(numbers.value())
+

Q4_emp_ID.py

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+"""Define the Employee class with an __init__() method
+--Define a class variable new_id and set it equal to 1
+--Each Employee instance will need its own unique ID. Thus, inside __init__(),
+define self.id and set it equal to the class variable new_id
+--Lastly, increment new_id by 1
+--Define a say_id() method
+--Inside say_id(), output the string "My id is " and then the instance id.
+Define the variable e1 and set it to an instance of Employee
+Define the variable e2 and set it to an instance of Employee
+Have both e1 and e2 output their ids"""
+
+
+class Employee:
+    new_id=1
+    def __init__(self):
+        self.employee_id = Employee.new_id
+        Employee.new_id+=1               
+
+    def say_id(self):
+        return "My ID is %d."%(self.employee_id)  # %d will display as integer.
+e1=Employee()
+e2=Employee()
+print(e1.say_id(),e2.say_id(),sep="\n")
+
+

Q5_vehicle.py

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+"""Create a Vehicle class with name, max_speed and mileage instance attributes
+--Add function __str__ to vehicle class and print the info about vehicle as: 
+   "Vehicle Model X has max speed 180 and mileage 12"
+--Create a child class Bus that will inherit all of the variables and methods 
+of the Vehicle class
+--Add attribute capacity to class Bus
+--Update Bus class such that print message will be: Bus Breng has max speed 
+180 and mileage 50 with capacity 100 (Hint: Override _str_ method)
+--Add update_capacity() method to the class Bus
+--Create a Vehicle and a Bus object and print both of them
+call update_capacity() method for the earlier created Bus object and print it,
+see the difference"""
+
+
+
+class Vehicle:
+    def __init__(self,name,max_speed,mileage):
+        self.name=name
+        self.max_speed=max_speed
+        self.mileage=mileage
+    def __str__(self):
+        return f"Vehicle:{self.name} has max speed {self.max_speed}km and mileage {self.mileage}."
+
+
+class Bus(Vehicle):  #inherits Vehicle and add capacity in Bus additionally
+    def __init__(self, name, max_speed, mileage,capacity):
+        Vehicle.__init__(self,name, max_speed, mileage)
+        self.capacity=capacity
+    def __str__(self): # we override ___str__ for Bus class,capacity will be added
+        return f"Bus:{self.name} has max speed {self.max_speed}km and mileage {self.mileage} with capacity {self.capacity}."
+
+    def updated_capacity(self,updated_capacity):  #to upgrade capacity
+        self.capacity=updated_capacity
+
+V=Vehicle("Ford",200,11)
+B=Bus("Man",200,20,40)
+
+print(V)
+print(B)
+B.updated_capacity(50)  #upgraded capacity as 50 for B
+print(B)