Converts camel case to snake case

camel_to_snake.py

# Kudos to: https://stackoverflow.com/a/12867228

def camel_to_snake(value: str) -> str:
    """
    Converts value in camel case to snake case:
    >>> camel_to_snake("camelCase")
    'camel_case'
    >>> camel_to_snake("PascalCase")
    'pascal_case'
    >>> camel_to_snake("one1Two2Three")
    'one1_two2_three'
    >>> camel_to_snake("getHTTPResponseCode")
    'get_httpresponse_code'
    """
    return re.sub("([A-Z]+)", r"_\1", value).lower().strip("_")

test_camel_to_snake.py

import pytest

from camel_to_snake import camel_to_snake


@pytest.mark.parametrize(
    "input, expected",
    [
        ("camelCase", "camel_case"),
        ("PascalCase", "pascal_case"),
        ("one1Two2Three", "one1_two2_three"),
        ("getHTTPResponseCode", "get_httpresponse_code"),
        ("", ""),
        ("123", "123"),
        ("123camelCase", "123camel_case"),
        ("123Kekeke", "123_kekeke"),
    ],
)
def test_camel_to_snake(input, expected):
    assert camel_to_snake(input) == expected