
import unittest
import user_code
import ast
import re   
import importlib
import csv
import unittest
import importlib

class TestTask(unittest.TestCase):
    def test_lambda_cubes_argument(self):
        import user_code
        importlib.reload(user_code)
        cube = getattr(user_code, 'cube', None)
        _dynamic_test(
            self,
            callable(cube),
            "cube is defined and callable",
            "cube is not defined as a callable lambda function",
        )
        for val in [0, 1, 2, 5, -3]:
            expected = val ** 3
            actual = cube(val) if cube is not None else None
            _dynamic_test(
                self,
                actual == expected,
                f"cube({val}) returns {expected}",
                f"cube({val}) should return {expected}, got {actual}",
            )

    def test_cubed_numbers_list(self):
        import user_code
        importlib.reload(user_code)
        numbers = [1, 2, 3, 4, 5]
        cubed_numbers = getattr(user_code, 'cubed_numbers', None)
        _dynamic_test(
            self,
            isinstance(cubed_numbers, list),
            "cubed_numbers is a list",
            f"cubed_numbers should be a list, got {type(cubed_numbers)}",
        )
        expected = [n ** 3 for n in numbers]
        _dynamic_test(
            self,
            cubed_numbers == expected,
            f"cubed_numbers contains cubes: {expected}",
            f"cubed_numbers should be {expected}, got {cubed_numbers}",
        )

    def test_lambda_used_with_map(self):
        code = ""
        with open("user_code.py", "r") as f:
            code = f.read()
        found_lambda = "lambda" in code
        found_map = "map(" in code
        _dynamic_test(
            self,
            found_lambda and found_map,
            "Used lambda function with map as required",
            "Solution must use a lambda function with map",
        )

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 normalize_text(text):
    text = text.lower()
    text = re.sub(r"\\s{2,}", " ", text)
    text = re.sub(r"\\s*([,:?])\\s*", r"\\1 ", text)
    return text.strip()

def change_var(code: str, var_name: str, value: str) -> str:
    tree = ast.parse(code)
    lines = code.splitlines()
    changed = False
    # Collect all assignment nodes to modify
    assign_nodes = [
        (i, node)
        for i, node in enumerate(tree.body)
        if isinstance(node, ast.Assign)
        and any(isinstance(target, ast.Name) and target.id == var_name for target in node.targets)
    ]

    # If nothing to change, return unmodified code
    if not assign_nodes:
        return code

    # Perform replacements for all matching assignments (from last to first to not break line offsets)
    for i, node in reversed(assign_nodes):
        start_line = node.lineno - 1
        line = lines[start_line]
        indent = ' ' * (len(line) - len(line.lstrip()))
        lines[start_line] = f"{indent}{var_name} = {value}"
        next_line = len(lines)
        for next_node in tree.body[i+1:]:
            if hasattr(next_node, 'lineno'):
                next_line = next_node.lineno - 1
                break
        if next_line > start_line + 1:
            lines[start_line+1:next_line] = []
        changed = True

    return '\\n'.join(lines) if changed else code

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


test_main.py

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高階関数の世界、関数を引数として渡す方法、およびlambdaによる簡潔な無名関数の記述について深く学びます。

変数のスコープの謎を解き明かし、ネストされた関数とクロージャが強力なカプセル化をどのように実現するかを学びます。

Pythonのイテレーションプロトコル、カスタムイテレーター、ジェネレーター関数による効率的なデータ処理を深く学習します。

チャレンジ：Lambdaとmap

解答