qml.devices.modifiers.single_tape_support

single_tape_support(cls)

Modifies all functions to accept single tapes in addition to batches. This allows the definition of the device class to purely focus on executing batches.

Parameters

cls (type) – a subclass of pennylane.devices.Device

Returns

type: The inputted class that has now been modified to accept single circuits as well as batches.

@single_tape_support
class MyDevice(qml.devices.Device):

    def execute(self, circuits, execution_config = qml.devices.DefaultExecutionConfig):
        return tuple(0.0 for _ in circuits)

>>> dev = MyDevice()
>>> t = qml.tape.QuantumScript()
>>> dev.execute(t)
0.0
>>> dev.execute((t, ))
(0.0,)

In this situation, MyDevice.execute only needs to handle the case where circuits is an iterable of QuantumTape objects, not a single value.

code/api/pennylane.devices.modifiers.single_tape_support

 

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