Args:
        func (function):

    Returns:
        tuple: keys, is_arbitrary
            keys (list): kwargs keys
            is_arbitrary (bool): has generic **kwargs

    CommandLine:
        python -m utool.util_inspect --test-get_kwargs

    Ignore:
        def func1(a, b, c):
            pass
        def func2(a, b, c, *args):
            pass
        def func3(a, b, c, *args, **kwargs):
            pass
        def func4(a, b=1, c=2):
            pass
        def func5(a, b=1, c=2, *args):
            pass
        def func6(a, b=1, c=2, **kwargs):
            pass
        def func7(a, b=1, c=2, *args, **kwargs):
            pass
        for func in [locals()['func' + str(x)] for x in range(1, 8)]:
            print(inspect.getargspec(func))

    Example:
        >>> # DISABLE_DOCTEST
        >>> from utool.util_inspect import *  # NOQA
        >>> # build test data
        >>> func = '?'
        >>> result = get_kwargs(func)
        >>> # verify results
        >>> print(result)

def get_kwargs(func):
    """
    Args:
        func (function):

    Returns:
        tuple: keys, is_arbitrary
            keys (list): kwargs keys
            is_arbitrary (bool): has generic **kwargs

    CommandLine:
        python -m utool.util_inspect --test-get_kwargs

    Ignore:
        def func1(a, b, c):
            pass
        def func2(a, b, c, *args):
            pass
        def func3(a, b, c, *args, **kwargs):
            pass
        def func4(a, b=1, c=2):
            pass
        def func5(a, b=1, c=2, *args):
            pass
        def func6(a, b=1, c=2, **kwargs):
            pass
        def func7(a, b=1, c=2, *args, **kwargs):
            pass
        for func in [locals()['func' + str(x)] for x in range(1, 8)]:
            print(inspect.getargspec(func))

    Example:
        >>> # DISABLE_DOCTEST
        >>> from utool.util_inspect import *  # NOQA
        >>> # build test data
        >>> func = '?'
        >>> result = get_kwargs(func)
        >>> # verify results
        >>> print(result)
    """
    #if argspec.keywords is None:
    import utool as ut
    argspec = inspect.getargspec(func)
    if argspec.defaults is not None:
        num_args = len(argspec.args)
        num_keys = len(argspec.defaults)
        keys = ut.take(argspec.args, range(num_args - num_keys, num_args))
    else:
        keys = []
    is_arbitrary = argspec.keywords is not None
    RECURSIVE = False
    if RECURSIVE and argspec.keywords is not None:
        pass
        # TODO: look inside function at the functions that the kwargs object is being
        # passed to
    return keys, is_arbitrary