Method invocation flow in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to call the method greet on the object person.

Python

class Person:
    def greet(self):
        print("Hello!")

person = Person()
person.[1]()

Drag options to blanks, or click blank then click option'

Asay_hello

Bhello

Cgreet

Dgreeting

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong method name that does not exist.

Forgetting the parentheses to call the method.

The method defined is named greet, so calling person.greet() runs it.

2fill in blank

medium

Complete the code to call the method add with argument 5 on the object calc.

Python

class Calculator:
    def add(self, x):
        return x + 10

calc = Calculator()
result = calc.[1](5)
print(result)

Drag options to blanks, or click blank then click option'

Asum

Bcalculate

Cplus

Dadd

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that does not exist.

Forgetting to pass the argument inside parentheses.

The method to add is named add, so calling calc.add(5) returns 15.

3fill in blank

hard

Fix the error by completing the code to call the method display on the object obj.

Python

class Display:
    def display(self):
        print("Showing content")

obj = Display()
obj[1]

Drag options to blanks, or click blank then click option'

A.display

B.display()

Cdisplay()

D->display()

Attempts:

3 left

💡 Hint

Common Mistakes

Missing the dot before the method name.

Missing the parentheses to call the method.

To call a method, you need the dot and parentheses: obj.display().

4fill in blank

hard

Fill both blanks to complete the method call that returns the length of the string stored in obj.text.

Python

class TextHolder:
    def __init__(self, text):
        self.text = text

obj = TextHolder("hello")
length = len(obj.text[1]()) if obj.text [2] "" else 0
print(length)

Drag options to blanks, or click blank then click option'

Astrip

B!=

C==

Dlen

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong comparison operators.

Using a method that does not exist on strings.

We call strip() to remove spaces, and check if obj.text != "" to ensure it's not empty.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps each word to its uppercase form if the word length is greater than 3.

Python

words = ["apple", "cat", "banana", "dog"]
result = { [1]: [2] for [3] in words if len(word) > 3 }
print(result)

Drag options to blanks, or click blank then click option'

Aword

Bword.upper()

D{word}

Attempts:

3 left

💡 Hint

Common Mistakes

Using curly braces around the key incorrectly.

Mixing up the key and value positions.

Using wrong variable names.

The dictionary comprehension uses {word: word.upper() for word in words if len(word) > 3} to map words longer than 3 letters to uppercase.