for x in iterable_string/list/list_item/tuple/tuple_item:
deal with ......
list ---> string, ''.join(list1, list2, list3, ...)
string ---> list, string.split('delimiter or empty space')
list ---> tuple, tuple(list)
tuple--->list, list(tuple)
int ---> string, str(int)
'integer' string ---> int, int('integer')
