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

class TestTask(unittest.TestCase):
    def test_returns_tuple_of_three(self):
        import user_code
        importlib.reload(user_code)
        result = getattr(user_code, 'result', None)
        _dynamic_test(
            self,
            isinstance(result, tuple) and len(result) == 3,
            "Returned value is a tuple of three elements",
            f"Expected a tuple of three elements, got: {result}",
        )

    def test_tuple_contains_exact_values(self):
        import user_code
        importlib.reload(user_code)
        result = getattr(user_code, 'result', None)
        expected = (10, 20, 30)
        _dynamic_test(
            self,
            result == expected,
            "Returned tuple contains the correct values (10, 20, 30)",
            f"Expected tuple {expected}, got: {result}",
        )

    def test_unpacking_works(self):
        import user_code
        importlib.reload(user_code)
        func = getattr(user_code, 'pack_to_tuple', None)
        test_values = [1, 2, 3]
        result = None
        if func:
            try:
                result = func(*test_values)
            except Exception as e:
                result = None
        _dynamic_test(
            self,
            isinstance(result, tuple) and result == (1, 2, 3),
            "Function works when called by unpacking a list of three elements.",
            f"Calling function with unpacked list [1, 2, 3] should return (1, 2, 3), got: {result}",
        )

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

Bliv fortrolig med pakning/udpaking, fleksible funktionsargumenter, højere-ordens funktioner, lambdaer, variabelscope, closures, iteratorer og dekoratører. Udviklet til kursister, der har gennemført et introduktionskursus i Python og ønsker at skrive mere effektiv, udtryksfuld og kraftfuld kode.

Udforsk kunsten at pakke og udpakke lister, tupler og ordbøger for at skrive mere udtryksfuld og effektiv Python-kode.

Dyk ned i verdenen af højereordensfunktioner, overførsel af funktioner som argumenter og skrivning af korte anonyme funktioner med lambda.

Opdag hemmelighederne bag variabelscope, og lær hvordan indlejrede funktioner og closures muliggør effektiv indkapsling.

Dyk ned i Pythons iterationsprotokol, brugerdefinerede iteratorer og generatorfunktioner for effektiv databehandling.

Challenge: Pakning og Udpakning af Lister og Tupler

Løsning