In this challenge, you'll **manage the daily stock levels** of essential grocery store products over a week. By utilizing the `range()` function in conjunction with the `len()` function, you'll simulate sales impacts on inventory.


import unittest
import importlib
import io
import re
import inspect
from contextlib import redirect_stdout
import user_code


def _dynamic_test(test_case, condition, success_message, failure_message):
    if condition:
        test_case._testMethodName = success_message
        test_case.assertTrue(True, success_message)
    else:
        test_case._testMethodName = failure_message
        test_case.fail(failure_message)


def strip_comments_from_source(module):
    try:
        source = inspect.getsource(module)
        lines = source.split('\\n')
        cleaned = []
        for line in lines:
            stripped = line.strip()
            if stripped.startswith('#'):
                continue
            if '#' in line:
                line = line.split('#')[0]
            if line.strip():
                cleaned.append(line)
        return '\\n'.join(cleaned)
    except Exception:
        return ""


class TestStockProcessing(unittest.TestCase):

    def normalize_text(self, text):
        text = text.lower()
        text = re.sub(r'\s+', ' ', text)
        text = re.sub(r'\s*([,:?\[\]\(\)])\s*', r'\1', text)
        return text.strip()

    def test_apples_final_stock(self):
        importlib.reload(user_code)
        result = user_code.products[0]
        _dynamic_test(
            self,
            result == ["Apples", 170],
            "Final stock for Apples is correctly updated to 170",
            f"Expected ['Apples', 170], got {result}"
        )

    def test_bananas_final_stock(self):
        importlib.reload(user_code)
        result = user_code.products[1]
        _dynamic_test(
            self,
            result == ["Bananas", 225],
            "Final stock for Bananas is correctly updated to 225",
            f"Expected ['Bananas', 225], got {result}"
        )

    def test_oranges_final_stock(self):
        importlib.reload(user_code)
        result = user_code.products[2]
        _dynamic_test(
            self,
            result == ["Oranges", 110],
            "Final stock for Oranges is correctly updated to 110",
            f"Expected ['Oranges', 110], got {result}"
        )

    def test_mangoes_final_stock(self):
        importlib.reload(user_code)
        result = user_code.products[3]
        _dynamic_test(
            self,
            result == ["Mangoes", 150],
            "Final stock for Mangoes is correctly updated to 150",
            f"Expected ['Mangoes', 150], got {result}"
        )

    def test_output_content(self):
        f = io.StringIO()
        with redirect_stdout(f):
            importlib.reload(user_code)
        output = self.normalize_text(f.getvalue())

        expected_lines = [
            "Stock after sales for Apples: 120 units",
            "Stock after sales for Bananas: 155 units",
            "Stock after sales for Oranges: 80 units",
            "Stock after sales for Mangoes: 110 units",
            "Stock after shipment for Apples: 170 units",
            "Stock after shipment for Bananas: 225 units",
            "Stock after shipment for Oranges: 110 units",
            "Stock after shipment for Mangoes: 150 units",
            "Final stock levels for all products: [['Apples', 170], ['Bananas', 225], ['Oranges', 110], ['Mangoes', 150]]"
        ]

        for line in expected_lines:
            expected = self.normalize_text(line)
            _dynamic_test(
                self,
                expected in output,
                f"Output includes line: {line}",
                f"Expected output: '{line}' not found."
            )

    def test_two_for_loops_with_range(self):
        source = strip_comments_from_source(user_code)
        loops = re.findall(r'for\s+\w+\s+in\s+range\s*\(', source)
        _dynamic_test(
            self,
            len(loops) >= 2,
            "Code uses two for loops with range() as required",
            f"Expected 2 for loops with range(), found {len(loops)}"
        )


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


test_main.py

Python is a high-level, interpreted, general-purpose programming
language. Distinguished from languages such as HTML, CSS, and JavaScript, which are mainly
utilized in web development, Python boasts versatility across multiple domains, including
software development, data science, and back-end development. This course will guide you
through Python's fundamental concepts, equipping you with the skills to create your own
functions by the conclusion of the program.

In this section, you will explore the fundamentals of Python, get acquainted
with your workspace, perform simple math operations, and display your findings.

In this section, you'll discover how to save items such as numbers and text
in computer memory and retrieve them by name. Additionally, you'll gain an introduction to text
manipulation in Python.

In this section, you'll explore the boolean data type and learn how it is used
to develop programs that react to certain conditions.

In this section, you will continue learning about data types and discover
how to organize various attributes in a single variable using lists, tuples, and dictionaries.

In this section, you'll learn how to create loops in Python — an essential skill
for iterating through lists, tuples, and dictionaries.

To conclude this introductory course, you will explore some built-in
functions and then begin to develop your own!

Challenge: Sales and Shipments

Output Requirements

Solution

Awesome!

Challenge: Sales and Shipments

Output Requirements

Solution