Creating several objects from one class

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. After s1 = Student('Ava') and s2 = Student('Liam'), how many Student objects exist?

A Two separate objects, made from one class

B One object that both s1 and s2 share

2. Which code creates two objects from the same Dog class?

A class d1(Dog) class d2(Dog)

B d1 = Dog('Rex') d2 = Dog('Bella')

3. s1.name is 'Ava' and s2.name is 'Liam'. You run s2.name = 'Zoe'. What is s1.name now?

A 'Ava' - it did not change

B 'Zoe' - both objects changed

4. Two Player objects both have an add_points() method. Where is that method defined?

A Once in the class, shared by both objects

B Separately inside each object, written twice

5. p1 = Player('Mia') and p2 = Player('Noah'), both starting with score 0. After p1.add_points(10), what is p2.score?

A 10

B 0

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1s2 = Student('Liam')		AUsing the class name changes the attribute on the class, not on one object. To change only one student use the object name, like s1.name = 'Zoe'.
2s1.name = 'Zoe'		Bs2 = s1 does not create a new object. It gives the same object a second name, so changing s2 also changes s1. Fix: s2 = Student('Liam').
3Two objects from the same class can hold different data in their attributes		Cs1 = Student('Ava') s2 = Student('Liam')
4Objects from one class share the same methods but give different results because their data differs		DCreates a second object from the Student class with its own separate name value
5s1 = Student('Ava') s2 = s1		EChanges the name of s1 only, so s2 keeps its old name
6Student.name = 'Zoe'		Fs1.greet() s2.greet()

Definitions

s2 = Student('Liam')

Fill in the Blanks

Complete each line of code by filling in the missing parts.

s1 = Student('Ava') s2 = _______('Liam')

s1 = Student('Ava') s2 = Student('Liam') print(__.name) # Liam

s1 = Student('Ava') s2 = Student('Liam') __.points = 5 # s1 is unchanged

s1.greet() # Hi, I am Ava s2._____() # Hi, I am Liam

class Student: def ________(self, name): self.name = name

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A class Student:

B def __init__(self, name):

C self.name == name

D s1 = Student('Ava')

E s2 = Student('Liam')

Question 2

A class Dog:

B def bark(self):

C print('Woof!)

D d1 = Dog()

E d2 = Dog()

F d2.bark()

Question 3

A class Car:

B def __init__(self, colour):

C self.colour = colour

D car1 = car('red')

E car2 = Car('blue')

Question 4

A Class Pet:

B def __init__(self, name):

C self.name = name

D p1 = Pet('Milo')

E p2 = Pet('Zara')

Question 5

A class Player

B def __init__(self, score):

C self.score = score

D a = Player(0)

E b = Player(0)

Answer Key

Creating several objects from one class

Section A: Quick Questions

A — Two separate objects, made from one class

B — d1 = Dog('Rex') d2 = Dog('Bella')

A — 'Ava' - it did not change

A — Once in the class, shared by both objects

B — 0

Section B: Match the Pairs

s2 = Student('Liam') → Creates a second object from the Student class with its own separate name value

s1.name = 'Zoe' → Changes the name of s1 only, so s2 keeps its old name

Two objects from the same class can hold different data in their attributes → s1 = Student('Ava') s2 = Student('Liam')

Objects from one class share the same methods but give different results because their data differs → s1.greet() s2.greet()

s1 = Student('Ava') s2 = s1 → s2 = s1 does not create a new object. It gives the same object a second name, so changing s2 also changes s1. Fix: s2 = Student('Liam').

Student.name = 'Zoe' → Using the class name changes the attribute on the class, not on one object. To change only one student use the object name, like s1.name = 'Zoe'.

Section C: Definitions

s2 = Student('Liam') — Creates a second object from the same class. Each object keeps its own attribute values, so changing s2 does not change s1, but both use the same methods.

Section D: Fill in the Blanks

s1 = Student('Ava')
s2 = Student('Liam')

s1 = Student('Ava')
s2 = Student('Liam')
print(s2.name)  # Liam

s1 = Student('Ava')
s2 = Student('Liam')
s2.points = 5  # s1 is unchanged

s1.greet()  # Hi, I am Ava
s2.greet()  # Hi, I am Liam

class Student:
    def __init__(self, name):
        self.name = name

Section E: Spot the Error

C — == compares values, so no attribute is stored. It should be self.name = name so every Student object keeps its own name.

C — The string is missing its closing quote. It should be print('Woof!'). Both Dog objects share this same bark method.

D — The class name is Car with a capital C, and Python is case sensitive. car is not defined, so it should be car1 = Car('red').

A — The keyword must be lowercase class. Without it you cannot create p1 and p2 from one Pet blueprint.

A — A class header must end with a colon. It should be class Player: so that a and b can both be created from it.