import copy
simple_list = ['a', 'b', 'c']
my_list = [
    ['a', 'b', 'c'],
    ['d', 'e', 'f'],
    ['g', 'h', 'i'],
]

do_dodania = ['j', 'k', 'l']
my_list.append(do_dodania)

my_list[0].append('s')

for list in my_list:
    list.append('xyz')

print(my_list)

# copy_list = copy.copy(my_list)
# deep_copy_list = copy.deepcopy(my_list)
# deep_copy_list[0][0] = 'x'
#
#
#
# for y in my_list:
#     for x in y:
#         if x == 'e':
#             print(my_list.index(y))
#             print(y.index(x))
#             break