Chapter Practice Arena

Modules, Files, and Errors Problems

Targeted practice challenges specifically curated for this chapter. Inspect hints, verify outputs, and check Pythonic solutions.

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Showing 6 challenges · 20 total · Page 1 of 4

#1intermediateDebugging and Assertions

Write an add(a, b) function that returns the sum of its arguments. Check that add(2, 3) equals 5, add(0, 0) equals 0, and add(-2, 2) equals 0. Print All checks passed after the checks.

Starter Code

def add(a, b):
    # Return the sum
    pass

# Add the three assertions
# Print the success message

Expected Output:All checks passed

#2intermediateDebugging and Assertions

Given text = '-3', convert it to an integer. If the number is negative, print Enter a nonnegative number. Otherwise, print Accepted: followed by the number. Use an if statement rather than assert.

Starter Code

text = '-3'
number = int(text)

# Check whether number meets the requirement

Expected Output:Enter a nonnegative number.

#3beginnerUseful Standard Library Tools

Import math and print the square root of 49, followed by the ceiling of 3.1.

Starter Code

import math

# Print the square root and ceiling

Expected Output:7.0 4

#4intermediateExceptions and Tracebacks

Write a function named divide(a, b) that raises ValueError with the message Divisor must not be zero. when b is zero. Otherwise, return a / b. Call divide(10, 0), catch ValueError, and print the exception message.

Starter Code

def divide(a, b):
    # Validate b and return the quotient
    pass

# Call the function and handle its error

Expected Output:Divisor must not be zero.

#5intermediateImporting Modules

Create a file named helpers.py that defines double(number) and returns number * 2. In a separate file named main.py, import helpers and print helpers.double(9). Save both files in the same project directory and run main.py.

Starter Code

# helpers.py
def double(number):
    # Return twice the number
    pass

# main.py
import helpers
print(helpers.double(9))

Expected Output:18

#6beginnerDebugging and Assertions

Calculate result = 5 * 5, assert that result equals 25, and print Verified. The program should print exactly Verified when the assertion succeeds.

Starter Code

result = 5 * 5
# Add an assertion here
# Print the required message

Expected Output:Verified