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

class TestTask(unittest.TestCase):
    def test_multiplier_by_3(self):
        import user_code
        importlib.reload(user_code)
        func = getattr(user_code, 'make_multiplier', None)
        _dynamic_test(
            self,
            callable(func),
            "make_multiplier is callable",
            "make_multiplier is not defined or not callable",
        )
        f = func(3) if func else None
        _dynamic_test(
            self,
            callable(f),
            "make_multiplier(3) returns a function",
            "make_multiplier(3) did not return a function",
        )
        res = f(10) if f else None
        _dynamic_test(
            self,
            res == 30,
            "Returned function multiplies by 3 correctly",
            f"Expected 30 for input 10, got {res}",
        )

    def test_multiplier_by_5(self):
        import user_code
        importlib.reload(user_code)
        func = getattr(user_code, 'make_multiplier', None)
        f = func(5) if func else None
        _dynamic_test(
            self,
            callable(f),
            "make_multiplier(5) returns a function",
            "make_multiplier(5) did not return a function",
        )
        res = f(4) if f else None
        _dynamic_test(
            self,
            res == 20,
            "Returned function multiplies by 5 correctly",
            f"Expected 20 for input 4, got {res}",
        )

    def test_negative_and_zero(self):
        import user_code
        importlib.reload(user_code)
        func = getattr(user_code, 'make_multiplier', None)
        f = func(-2) if func else None
        _dynamic_test(
            self,
            callable(f),
            "make_multiplier(-2) returns a function",
            "make_multiplier(-2) did not return a function",
        )
        res_neg = f(5) if f else None
        _dynamic_test(
            self,
            res_neg == -10,
            "Returned function multiplies negative multiplier correctly",
            f"Expected -10 for input 5, got {res_neg}",
        )
        res_zero = f(0) if f else None
        _dynamic_test(
            self,
            res_zero == 0,
            "Returned function multiplies zero correctly",
            f"Expected 0 for input 0, got {res_zero}",
        )

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

パッキング／アンパッキング、柔軟な関数引数、高階関数、ラムダ、変数スコープ、クロージャ、イテレータ、デコレータを習得します。入門レベルのPythonコースを修了し、より効率的で表現力豊かかつ強力なコードを書きたい学習者向けに設計されています。

リスト、タプル、辞書のパッキングおよびアンパッキングの技術を探求し、より表現力が高く効率的なPythonコードの記述を目指します。

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：乗算関数を返す

解答