Array Constructor for Lists/Structs

[aersam]

Hi guys

I try creating an Array of a List of Structs, seems not be implemented yet:

NotImplementedError: Array constructor for List(Field { name: "", data_type: Struct([Field { name: "quantity", data_type: Int32, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }, Field { name: "price", data_type: Float64, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }, Field { name: "rebate", data_type: Float64, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }]), nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }) not yet implemented.

Or am I supposed to pass data differently? Is it possible to create an array of lists already from python objects somehow?

[kylebarron]

Please provide a minimal reproducible example.

There are also specific constructors for list, fixed size list, and struct: https://kylebarron.dev/arro3/latest/api/core/constructors/#arro3.core

[aersam]

Ah ok, I see, I should use these methods, I'll try. However nulls/None seem not to be supported by them?

[kylebarron]

We can add a mask argument there. It would be nice to also add support in the primary constructor but handling nested types seems kinda hard. A PR is welcome though!