qml.resource.substitute

substitute(initial_resources, gate_info, replacement)

Replaces a specified gate in a Resources object with the contents of another Resources object.

Parameters:

• initial_resources (Resources) – the Resources object to be modified

• gate_info (Iterable(str, int)) – sequence containing the name of the gate to be replaced and the number of wires it acts on

• replacement (Resources) – the Resources containing the resources that will replace the gate

Returns:

the updated Resources after substitution

Return type:

Resources

Usage Details

Example

First we build the Resources.

from pennylane.measurements import Shots
from pennylane.resource import Resources

initial_resources = Resources(
    num_wires = 2,
    num_gates = 3,
    gate_types = {"RX": 2, "CNOT": 1},
    gate_sizes = {1: 2, 2: 1},
    depth = 2,
    shots = Shots(10)
)

# the RX gates will be replaced by the substitution
gate_info = ("RX", 1)

replacement = Resources(
    num_wires = 1,
    num_gates = 7,
    gate_types = {"Hadamard": 3, "S": 4},
    gate_sizes = {1: 7},
    depth = 7
)

Now we print the result of the substitution.

>>> res = qml.resource.substitute(initial_resources, gate_info, replacement)
>>> print(res)
wires: 2
gates: 15
depth: 9
shots: Shots(total=10)
gate_types:
{'CNOT': 1, 'H': 6, 'S': 8}
gate_sizes:
{1: 14, 2: 1}

code/api/pennylane.resource.substitute

 

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