OOP – Methods

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. What is a method?

A A standalone function

B A function defined inside a class

2. What must be the first parameter of a method?

A self

B this

3. dog.bark() do you pass self?

A No Python passes it automatically

B Yes

4. Can methods access self.name?

A No

B Yes that's how they use object data

5. Can methods return values?

A Yes just like regular functions

B No methods can't return

Match the Pairs

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

Left column		Right column
1def bark():		AOk: Access instance attribute in a method
2dog.Bark()		BValid: Method with required self
3def bark(self):		COutput: HELLO
4self.name		DError: Method names are case-sensitive
5'hello'.upper()		EOutput: 2
6[1,2,2].count(2)		FError: Missing self parameter

Definitions

Method

Fill in the Blanks

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

class Dog: def bark(____): return 'Woof!'

class Dog: def bark(self): return ____.name + ' says Woof!'

dog = Dog('Rex') print(dog.____( ))

class Counter: def ________(self): self.count = 0 def increment(self): self.count __ 1

class Circle: def area(self): ______ 3.14 * self.radius ** 2

Spot the Error

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

Question 1

A class Dog:

B def bark():

C return 'Woof!'

Question 2

A class Dog:

B def __init__(self, name):

C self.name = name

D def bark(self):

E return name + ' says Woof!'

Question 3

A dog = Dog('Rex')

B dog.bark

Question 4

A class Dog:

B def bark(self):

C return 'Woof!'

E Dog.bark()

Question 5

A class Dog:

B def bark(self):

C return 'Woof!'

E dog = Dog()

F print(dog.bark(self))

Answer Key

OOP – Methods

Section A: Quick Questions

B — A function defined inside a class

A — self

A — No Python passes it automatically

B — Yes that's how they use object data

A — Yes just like regular functions

Section B: Match the Pairs

def bark(): → Error: Missing self parameter

dog.Bark() → Error: Method names are case-sensitive

def bark(self): → Valid: Method with required self

self.name → Ok: Access instance attribute in a method

'hello'.upper() → Output: HELLO

[1,2,2].count(2) → Output: 2

Section C: Definitions

Method — A function defined inside a class.~~self

Section D: Fill in the Blanks

class Dog:
    def bark(self):
        return 'Woof!'

class Dog:
    def bark(self):
        return self.name + ' says Woof!'

dog = Dog('Rex')
print(dog.bark(  ))

class Counter:
    def __init__(self):
        self.count = 0
    def increment(self):
        self.count += 1

class Circle:
    def area(self):
        return 3.14 * self.radius ** 2

Section E: Spot the Error

B — Missing self parameter every method needs self as first parameter

E — Use self.name inside methods name alone is not defined here

B — Missing parentheses bark is a method, call it with ()

E — Call methods on objects, not the class. Create an object first.

F — Don't pass self when calling Python fills it in automatically