
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

Bemästra packning/uppackning, flexibla funktionsargument, högre ordningens funktioner, lambdas, variabelräckvidd, closures, iteratorer och dekoratörer. Utformad för studenter som har genomfört en introduktionskurs i Python och vill skriva mer effektiv, uttrycksfull och kraftfull kod.

Utforska konsten att packa och packa upp listor, tupler och ordböcker för att skriva mer uttrycksfull och effektiv Python-kod.

Fördjupa dig i världen av högre ordningens funktioner, att skicka funktioner som argument och att skriva koncisa anonyma funktioner med lambda.

Avslöja mysterierna kring variabelns räckvidd och lär dig hur nästlade funktioner och closures möjliggör kraftfull inkapsling.

Fördjupa dig i Pythons iterationsprotokoll, anpassade iteratorer och generatorfunktioner för effektiv databehandling.

Utmaning: Returnera en Multiplikatorfunktion

Lösning