qml.pytrees.PyTreeStructure

class PyTreeStructure(type_=None, metadata=(), children=<factory>)

Bases: object

A pytree data structure, holding the type, metadata, and child pytree structures.

>>> op = qml.adjoint(qml.RX(0.1, 0))
>>> data, structure = qml.pytrees.flatten(op)
>>> structure
PyTreeStructure(AdjointOperation, (), [PyTreeStructure(RX, (Wires([0]), ()), [PyTreeStructure()])])

A leaf is defined as just a PyTreeStructure with type_=None.

Attributes

is_leaf	Whether or not the structure is a leaf.
metadata	Any metadata needed to reproduce the original object.
type_	The type corresponding to the node.

is_leaf

Whether or not the structure is a leaf.

metadata = ()

Any metadata needed to reproduce the original object.

type_ = None

The type corresponding to the node. If None, then the structure is a leaf.

code/api/pennylane.pytrees.PyTreeStructure

 

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