def split(src, keys):
    """
    >>> split({1:2, 3:4, 5:6, 7:8}, (1,3))
    ({1: 2, 3: 4}, {5: 6, 7: 8})
    
    >>> split(((1, 2), (3, 4), (5, 6), (7, 8)), (1,3))
    ({1: 2, 3: 4}, {5: 6, 7: 8})
    """
    have, dont = {}, {}
    items = src.items() if hasattr(src, "items") else src
    for key, value in items:
        (have if key in keys else dont)[key] = value
    return have, dont