Custom error messages in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to raise a ValueError with a custom message.

Python

if age < 0:
    raise ValueError([1])

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

A"Age cannot be negative"

BAge cannot be negative

CValueError

Dprint("Error")

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the message

Using a variable name instead of a string

Trying to print instead of raise

The raise statement needs a string message inside quotes to show a custom error message.

2fill in blank

medium

Complete the code to raise a TypeError with a custom message when input is not a string.

Python

if not isinstance(name, str):
    raise TypeError([1])

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

AInput must be a string

BTypeError

C"Input must be a string"

Dprint("Wrong type")

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes for the message

Raising the wrong error type

Using print instead of raise

The error message must be a string inside quotes to explain the type error.

3fill in blank

hard

Fix the error in raising a custom error message for zero division.

Python

if denominator == 0:
    raise ZeroDivisionError([1])

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

Aprint("Error")

BZeroDivisionError

C0

D"Cannot divide by zero"

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the error class instead of a message

Using print instead of raise

Passing a number instead of a string

The message must be a string explaining the error, inside quotes.

4fill in blank

hard

Fill both blanks to raise a custom error with a message including the invalid value.

Python

if score < 0 or score > 100:
    raise ValueError(f"Invalid score: [1]")

# Use the variable name in the message
invalid_value = [2]

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

Ascore

Bvalue

Dscore_value

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong variable name

Not using the variable inside the f-string

Assigning invalid_value to a non-existent variable

The variable 'score' holds the invalid value and should be used in the message and assigned to invalid_value.

5fill in blank

hard

Fill all three blanks to raise a custom error with a message showing the invalid input and its type.

Python

if not isinstance(data, dict):
    raise TypeError(f"Expected dict but got [1] of type [2]")

actual_type = type([3]).__name__

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

Adata

Dinput

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in blanks

Not using f-string formatting

Forgetting to get the type name with __name__

The variable 'data' is used to show the invalid input and get its type name.