Time complexity of dict vs attributes

[heras]

You are brilliant!
A small test:

>>> a = {'as': [1,2,3,4,5,6]}
>>> a
{'as': [1, 2, 3, 4, 5, 6]}
>>> len(a['as'])
6
>>> len(a['as'][:])
6

I will see if I can figure out on my own what happens here. The dict version is totally fast now. Thanks!