def concat(*items):
    """
    Turn each item to a string and concatenate the strings together
    """
    sep = ""
    if len(items) == 1 and (
        isinstance(items[0], (list, tuple, set)) or hasattr(items[0], "as_list")
    ):
        items = items[0]
        sep = ", "
    return sep.join(map(str, items))