Can you suggestion how to get key??
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The error is correct 
Dictionaries and Lists are different types in dynamo 2.0
You are using Dictionary.Keys on a list type.
You can use the list counts or list lengths to generate the indices of the lists.
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I think it’s a bit of shame that GetKeys on lists was deprecated in 2.0 as it had uses that aren’t fulfilled directly by the new dictionary nodes (as far as I can see—I may be wrong of course!) such as quickly getting the indexes of a list for when I wanted to later reassemble them after boolean filtering and stitching back together again.
Anyway, I now use DesignScript when I need that functionality in 2.0:
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+1 on both counts. Seems wierd to get rid of List Keys node, but using DS works great, although trickier if list at level is required.
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+2 the GetKeys function was so useful inside imperative blocks, in particular with if statements.