misc_utils.py

from typing import TypeVar, Collection, Callable, Any

T = TypeVar("T")


def not_in(collection: Collection[T]) -> Callable[[T], bool]:
    """Evaluates to a function that tests that an item is _not_ in a collection.

    Inverse of `x in collection`.
    """
    return lambda x: x not in collection


def tuple_fn(
    function_of_multiple_arguments: Callable[[Any], T]
) -> Callable[[tuple], T]:
    """Wraps a function that accepts N arguments to a function that accepts a tuple of length N.
    """
    return lambda args: function_of_multiple_arguments(*args)