qml.resource.Resources

class Resources(num_wires=0, num_gates=0, gate_types=<factory>, gate_sizes=<factory>, depth=0, shots=<factory>)

Bases: object

Contains attributes which store key resources such as number of gates, number of wires, shots, depth and gate types.

Parameters

• num_wires (int) – number of qubits

• num_gates (int) – number of gates

• gate_types (dict) – dictionary storing operation names (str) as keys and the number of times they are used in the circuit (int) as values

• gate_sizes (dict) – dictionary storing the number of \(n\) qubit gates in the circuit as a key-value pair where \(n\) is the key and the number of occurances is the value

• depth (int) – the depth of the circuit defined as the maximum number of non-parallel operations

• shots (Shots) – number of samples to generate

Usage Details

The resources being tracked can be accessed as class attributes. Additionally, the Resources instance can be nicely displayed in the console.

Example

>>> r = Resources(num_wires=2, num_gates=2, gate_types={'Hadamard': 1, 'CNOT':1}, gate_sizes={1: 1, 2: 1}, depth=2)
>>> print(r)
wires: 2
gates: 2
depth: 2
shots: Shots(total=None)
gate_types:
{'Hadamard': 1, 'CNOT': 1}
gate_sizes:
{1: 1, 2: 1}

Attributes

depth
num_gates
num_wires

depth: int = 0

num_gates: int = 0

num_wires: int = 0

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