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How to type records #126

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shaunc opened this issue Dec 26, 2024 · 1 comment

shaunc commented Dec 26, 2024

I have a recarray, typed as:

NodeType = Structure[
    """
    value: Float32,
    weight: Float32,
    left: UInt16,
    right: UInt16,
    parent: UInt16,
    balance: Int8,
    """
]
NodeArrayType = RecArray[Shape["*"], NodeType]

Using individual node "works" because getitem returns Any (shouldn't it return NodeType?):

node = nodes[i_node]  # node type: Any
node.left = ... # ok

But when I pass a node to a subroutine, shouldn't its type be "NodeType"?

def foo(node: NodeType) -> None:
    node.left = ... # pylance type error 
    # "Cannot assign to attribute "value" for class "NodeType" Attribute "value" is unknown"

Is this a pylance (pyright) specific problem ... or am I using NodeType wrongly for individual records?

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