def test_append (list1):
res = []
for elem in list1:
res.append(elem )
return res
def mod_list (list1):
modified_list = test_append(list1)
for elem in modified_list:
elem[0] = 'A'
elem[1] = 'B'
return modified_list
my_list = [[1,2], [3,4], [5,6]]
print(my_list)
result = mod_list(my_list)
print(my_list)
print(result)
ZGVmIHRlc3RfYXBwZW5kIChsaXN0MSk6CiAgICByZXMgPSBbXQogICAgZm9yIGVsZW0gaW4gbGlzdDE6CiAgICAgICAgcmVzLmFwcGVuZChlbGVtICkKICAgIHJldHVybiByZXMKCmRlZiBtb2RfbGlzdCAobGlzdDEpOgogICAgbW9kaWZpZWRfbGlzdCA9IHRlc3RfYXBwZW5kKGxpc3QxKQogICAgZm9yIGVsZW0gaW4gbW9kaWZpZWRfbGlzdDoKICAgICAgICBlbGVtWzBdID0gJ0EnCiAgICAgICAgZWxlbVsxXSA9ICdCJwogICAgcmV0dXJuIG1vZGlmaWVkX2xpc3QKCm15X2xpc3QgPSBbWzEsMl0sIFszLDRdLCBbNSw2XV0KCnByaW50KG15X2xpc3QpCnJlc3VsdCA9IG1vZF9saXN0KG15X2xpc3QpCnByaW50KG15X2xpc3QpCnByaW50KHJlc3VsdCk=
[[1, 2], [3, 4], [5, 6]]
[['A', 'B'], ['A', 'B'], ['A', 'B']]
[['A', 'B'], ['A', 'B'], ['A', 'B']]