Error in running 3.1

[lenachenpumc]

Dear all This is my first time using python and abagen. I am replicating the tutorial by jupyter. All works well until section 3.1. When I run expression = abagen.get_expression_data(atlas['image'], atlas['info'])

I got error like

TypeError Traceback (most recent call last) Input In [18], in <cell line: 1>() ----> 1 expression = abagen.get_expression_data(atlas['image'], atlas['info'])

TypeError: 'AtlasTree' object is not subscriptable

Best wishes, lena