Lists

Question

(Input)
number = 3
things = ["string", 0, [1, 2, number], 4, 4.56]
print(things[1])
print(things[2])
print(things[2][2][4])

(Output)
0
[1, 2, 3]

Traceback (most recent call last):
File "..\Playground\", line 5, in <module>
print(things[2][2][3])
TypeError: 'int' object is not subscriptable

But when the input is
number = 3
things = ["string", 0, [1, 2, number], 4, 4.56]
print(things[1])
print(things[2])
print(things[2][2])
print(things[4])

Output is
0
[1, 2, 3]
3
4.56

Can someone tell me why it's not working?

Answer 1

Let's look at what things[2][2][4] does:

It says: Go to the element in position 2 of things (we get: [1, 2, number]) then go to the element in position 2 of that element (we get number) then go to the element in position 4 of number. There is no element in position 4 of number. That is why you get an error

Answer 2

the first bit wont work because you are trying to find an index of a 3 dimensional array when you are only using a 2 dimensional array and by trying to print things[2][2][4] it will only get as far as finding the 2nd index of the 2nd index of things which is 3 and it then tries to find the 4th index of 3 which will result in an error as an integer DOES NOT have an index as indexing can only be done with strings or arrays (lists)