from typing import Iterable
from typing import Any


def in_(column: str, values: Iterable[Any]) -> str:
    """
    >>> in_("col", [])
    '1'
    >>> in_("col", [1,2,3])
    'col in [1,2,3]'
    """
    if not values:
        return "1"
    return f"{column} in [{','.join(map(str, values))}]"