Chapter Practice Arena

Testing, Quality, and Packaging Problems

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

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Showing 6 challenges · 17 total · Page 1 of 3

#1beginnerLogging and Diagnostics

Convert the string 'hello' to an integer. Catch ValueError and log a message with the traceback using logger.exception(). After handling the error, print Done.

Starter Code

import logging
import sys

# Configure logging and handle the conversion error.

Expected Output:ERROR:Integer conversion failed A traceback containing ValueError is also logged. Done

#2beginnerProject Structure and Packaging

Assume the calculator package is installed or importable. Import add from calculator and print the result of add(6, 4).

Starter Code

# Write your solution below

Expected Output:10

#3beginnerProject Structure and Packaging

For each task, name the most suitable file or location: (1) explain how to install and use the project, (2) store build-system and project metadata, (3) define arithmetic functions, and (4) write automated tests.

Starter Code

# Answer in comments or in your own notes.

Expected Output:1. README.md 2. pyproject.toml 3. src/calculator/operations.py 4. tests/test_operations.py

#4beginnerVirtual Environments and pip

Write the command that installs pytest using the pip associated with the currently selected Python interpreter. Then write a command that checks which pip installation is being used.

Starter Code

# Install pytest

# Check pip location

Expected Output:pip attempts to install pytest and then displays the pip version and installation location.

#5beginnerUnit Testing with unittest

Write a function multiply(a, b) and a unittest.TestCase class with a test method that verifies multiply(3, 4) returns 12. Run the tests using unittest.main().

Starter Code

import unittest

def multiply(a, b):
    # Implement multiplication
    pass

class MultiplyTests(unittest.TestCase):
    def test_multiply(self):
        # Add an assertion
        pass

if __name__ == '__main__':
    unittest.main()

Expected Output:The test runner reports one passing test, similar to: . ---------------------------------------------------------------------- Ran 1 test in 0.000s OK

#6intermediateUnit Testing with unittest

The function subtract(a, b) accidentally returns a + b. Write a test that expects subtract(8, 3) to return 5. Run it and explain why it fails before correcting the function.

Starter Code

import unittest

def subtract(a, b):
    return a + b

class SubtractTests(unittest.TestCase):
    def test_subtracts_numbers(self):
        # Write an assertion that exposes the defect
        pass

Expected Output:After correcting subtract(), the test runner reports one passing test, similar to: . ---------------------------------------------------------------------- Ran 1 test in 0.000s OK