cirq.quirk_json_to_circuit

Constructs a Cirq circuit from Quirk's JSON format.

cirq.quirk_json_to_circuit(
    data: dict,
    *,
    qubits: Optional[Sequence['cirq.Qid']] = None,
    extra_cell_makers: Union[Dict[str, 'cirq.Gate'], Iterable['cirq.interop.quirk.cells.CellMaker']] = (),
    quirk_url: Optional[str] = None,
    max_operation_count: int = (10 ** 6)
) -> 'cirq.Circuit'

Used in the notebooks

Used in the tutorials

data Data parsed from quirk's JSON representation.
qubits Qubits to use in the circuit. See quirk_url_to_circuit.
extra_cell_makers Non-standard Quirk cells to accept. See quirk_url_to_circuit.
quirk_url If given, the original URL from which the JSON was parsed, as described in quirk_url_to_circuit.
max_operation_count If the number of operations in the circuit would exceed this value, the method raises a ValueError instead of attempting to construct the circuit. This is important to specify for servers parsing unknown input, because Quirk's format allows for a billion laughs attack in the form of nested custom gates.

Examples:

print(cirq.quirk_json_to_circuit(
    {"cols":[["H"], ["•", "X"]]}
))
0: ───H───@───
          │
1: ───────X───

The parsed circuit.

ValueError Invalid circuit URL, or circuit would be larger than max_operations_count.