typeguard

from typeguard import typechecked from typing import List @typechecked def process_data(data: List[int], multiplier: float) -> List[float]: """Processes a list of integers, multiplies each by a float, and returns a list of floats.""" return [item * multiplier for item in data] @typechecked class MyCalculator: def __init__(self, offset: int): self.offset = offset def add(self, a: int, b: int) -> int: return a + b + self.offset # --- Successful usage --- print(f"Processed data: {process_data([1, 2, 3], 2.5)}") # Expected: [2.5, 5.0, 7.5] calculator = MyCalculator(offset=10) print(f"Calculator sum: {calculator.add(5, 7)}") # Expected: 22 # --- Intentional type errors (will raise TypeError) --- try: process_data([1, '2', 3], 2.5) # data contains a string instead of int except TypeError as e: print(f"Caught expected error (list item type): {e}") try: process_data([1, 2, 3], '2.5') # multiplier is a string instead of float except TypeError as e: print(f"Caught expected error (argument type): {e}") try: calculator.add(5, 'seven') # b is a string instead of int except TypeError as e: print(f"Caught expected error (method argument type): {e}")