- class qiskit.circuit.SwitchCaseOp(target, cases, *, label=None)#
A circuit operation that executes one particular circuit block based on matching a given
targetagainst an ordered list of
values. The special value
CASE_DEFAULTcan be used to represent a default condition.
This is the low-level interface for creating a switch-case statement; in general, the circuit method
QuantumCircuit.switch()should be used as a context manager to access the builder interface. At the low level, you must ensure that all the circuit blocks contain equal numbers of qubits and clbits, and that the order the virtual bits of the containing circuit should be bound is the same for all blocks. This will likely mean that each circuit block is wider than its natural width, as each block must span the union of all the spaces covered by any of the blocks.
cases (Iterable[Tuple[Any, QuantumCircuit]]) – an ordered iterable of the corresponding value of the
targetand the circuit block that should be executed if this is matched. There is no fall-through between blocks, and the order matters.
Create a new instruction.
name (str) – instruction name
num_qubits (int) – instruction’s qubit width
num_clbits (int) – instruction’s clbit width
unit (str) – time unit of duration
label (str or None) – An optional label for identifying the instruction.
Get Clbits in condition.
Get the decompositions of the instruction from the SessionEquivalenceLibrary.
Return definition in terms of other basic gates.
Get the duration.
Return instruction label
Return the name.
Return the number of clbits.
Return the number of qubits.
return instruction params.
Get the time unit of duration.
Add a decomposition of the instruction to the SessionEquivalenceLibrary.
Assemble a QasmQobjInstruction
- broadcast_arguments(qargs, cargs)#
Validation of the arguments.
qargs (List) – List of quantum bit arguments.
cargs (List) – List of classical bit arguments.
Tuple(List, List) – A tuple with single arguments.
CircuitError – If the input is not valid. For example, the number of arguments does not match the gate expectation.
- c_if(classical, val)#
Set a classical equality condition on this instruction between the register or cbit
This is a setter method, not an additive one. Calling this multiple times will silently override any previously set condition; it does not stack.
Return a lookup table from case labels to the circuit that would be executed in that case. This object is not generally suitable for creating a new
SwitchCaseOpbecause any keys that point to the same object will not be grouped.
Return an iterable where each element is a 2-tuple whose first element is a tuple of jump values, and whose second is the single circuit block that is associated with those values.
This is an abstract specification of the jump table suitable for creating new
Create a lookup table that you can use for your own purposes to jump from values to the circuit that would be executed.
Copy of the instruction.
Invert this instruction.
If the instruction is composite (i.e. has a definition), then its definition will be recursively inverted.
Special instructions inheriting from Instruction can implement their own inverse (e.g. T and Tdg, Barrier, etc.)
Return True .IFF. instruction is parameterized else False
Return a default OpenQASM string for the instruction.
Derived instructions may override this to print in a different format (e.g. measure q -> c;).
Deprecated since version 0.25.0: The method
qiskit.circuit.instruction.Instruction.qasm()is deprecated as of qiskit-terra 0.25.0. It will be removed no earlier than 3 months after the release date. Correct exporting to OpenQASM 2 is the responsibility of a larger exporter; it cannot safely be done on an object-by-object basis without context. No replacement will be provided, because the premise is wrong.
Creates an instruction with gate repeated n amount of times.
Replace blocks and return new instruction. :param blocks: Tuple of QuantumCircuits to replace in instruction.
New ControlFlowOp with replaced blocks.
- Return type:
For a composite instruction, reverse the order of sub-instructions.
This is done by recursively reversing all sub-instructions. It does not invert any gate.
- a new instruction with
- Return type:
Soft comparison between gates. Their names, number of qubits, and classical bit numbers must match. The number of parameters must match. Each parameter is compared. If one is a ParameterExpression then it is not taken into account.
other (instruction) – other instruction.
are self and other equal up to parameter expressions.
- Return type:
Instruction parameters has no validation or normalization.