from typing import Iterable
from typing import List


def flatten_lists(list_of_lists:Iterable) -> List:
    """ Flatten a list of iterables into a single list
    
    This function does not further flatten inner iterables.

    Parameters
    ----------
    list_of_lists : typing.Iterable
        The iterable to flatten

    Returns
    -------
    flattened_list: typing.List
        The flattened list
    """
    return [item for sublist in list_of_lists for item in sublist]