Python multi array?

Question

Python

That I ask too many questions today.
Guys help me with one more problem.

__data = dict()

__data[data[0]][data[1]][data[2]] = [
                {'id':data[2]}
            ]

Why doesn't that work.
I did this in php

$this->data[$data[0]][$data[1]][$data[2]] = [
                'id' => $data[2]
            ];