def dict_2_list(dict_list, key_val):

    """Function:  dict_2_list

    Description:  Converts a dictionary array list to a array list, based on a
        key value passed to the function.  Only those values for the key value
        will be put into the list.

    Arguments:
        (input) dict_list -> Dictionary array list.
        (input) key_val -> Key value in the dictionary key.
        (output) arry_list -> Array list of values for key value.

    """

    return [row[key_val] for row in list(dict_list) if key_val in row]