今更pytest&pytest-cov - Qiita

import re def sum_up(a: int, b: int) -> int: return a + b def subtract(a: int, b: int) -> int: return a - b def sum_up_str(a: int | str, b: int | str) -> int: # check if a and b are castable to int if re.match(r"^\d+$", str(a)) is None: raise ValueError("a is not castable to int") if re.match(r"^\d+$", str(b)) is None: raise ValueError("b is not castable to int") if isinstance(a, str): a = int(a)