qml.measurements.MeasurementValue

class MeasurementValue(measurements, processing_fn=None)

Bases: Generic[T]

A class representing unknown measurement outcomes in the qubit model.

Measurements on a single qubit in the computational basis are assumed.

Parameters:

• measurements (list[.MidMeasureMP]) – The measurement(s) that this object depends on.

• processing_fn (callable | None) – A lazy transformation applied to the measurement values.

Attributes

branches	A dictionary representing all possible outcomes of the MeasurementValue.
has_processing	Whether or not classical processing is applied to the measurement value.
name
processing_fn	A lazy transformation applied to the measurement values.
wires	Returns a list of wires corresponding to the mid-circuit measurements.

branches

A dictionary representing all possible outcomes of the MeasurementValue.

has_processing

Whether or not classical processing is applied to the measurement value.

name = 'MeasurementValue'

processing_fn

A lazy transformation applied to the measurement values.

wires

Returns a list of wires corresponding to the mid-circuit measurements.

Methods

concretize(measurements)	Returns a concrete value from a dictionary of hashes with concrete values.
items()	A generator representing all the possible outcomes of the MeasurementValue.
map_wires(wire_map)	Returns a copy of the current MeasurementValue with the wires of each measurement changed according to the given wire map.
postselected_items()	A generator representing all the possible outcomes of the MeasurementValue, taking postselection into account.

concretize(measurements)

Returns a concrete value from a dictionary of hashes with concrete values.

items()

A generator representing all the possible outcomes of the MeasurementValue.

map_wires(wire_map)

Returns a copy of the current MeasurementValue with the wires of each measurement changed according to the given wire map.

Parameters:

wire_map (dict) – dictionary containing the old wires as keys and the new wires as values

Returns:

new MeasurementValue instance with measurement wires mapped

Return type:

MeasurementValue

postselected_items()

A generator representing all the possible outcomes of the MeasurementValue, taking postselection into account.

code/api/pennylane.measurements.MeasurementValue

 

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