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refactor: modernize input type validation #7

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Merged
Miladkhoshdel merged 1 commit into from
Sep 11, 2026
Merged

refactor: modernize input type validation #7

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6 changes: 2 additions & 4 deletions luhn.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,17 +2,15 @@

from __future__ import annotations

from typing import Union

NumberLike = Union[str, int]
NumberLike = str | int
REMOVE_CHARS = " -./\\,"
DIGIT_CLEANUP_TABLE = str.maketrans("", "", REMOVE_CHARS)


def _digits(value: NumberLike) -> str:
"""Return only digits, allowing spaces, hyphens, dots, slashes, backslashes, and commas as separators."""
if isinstance(value, bool) or not isinstance(value, (str, int)):
raise ValueError("value must be a string or non-boolean integer")
raise TypeError("value must be a string or non-boolean integer")

cleaned = str(value).strip().translate(DIGIT_CLEANUP_TABLE)

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