Snapshot#

class qiskit.extensions.Snapshot(label, snapshot_type='statevector', num_qubits=0, num_clbits=0, params=None)[código fonte]#

Bases: Instruction

Simulator snapshot instruction.

Create new snapshot instruction.

Parâmetros:

label (str) – the snapshot label for result data.
snapshot_type (str) – the type of the snapshot.
num_qubits (int) – the number of qubits for the snapshot type [Default: 0].
num_clbits (int) – the number of classical bits for the snapshot type [Default: 0].
params (list or None) – the parameters for snapshot_type [Default: None].

Levanta:

ExtensionError – if snapshot label is invalid.

Attributes

condition_bits#: Get Clbits in condition.

decompositions#: Get the decompositions of the instruction from the SessionEquivalenceLibrary.

definition#: Return definition in terms of other basic gates.

duration#: Get the duration.

label#: Return instruction label

name#: Return the name.

num_clbits#: Return the number of clbits.

num_qubits#: Return the number of qubits.

params#: return instruction params.

snapshot_type#: Return snapshot type

unit#: Get the time unit of duration.

Methods

add_decomposition(decomposition)#: Add a decomposition of the instruction to the SessionEquivalenceLibrary.

assemble()[código fonte]#: Assemble a QasmQobjInstruction

broadcast_arguments(qargs, cargs)#

Validation of the arguments.

Parâmetros:

qargs (List) – List of quantum bit arguments.
cargs (List) – List of classical bit arguments.

Yields:

Tuple(List, List) – A tuple with single arguments.

Levanta:

CircuitError – If the input is not valid. For example, the number of arguments does not match the gate expectation.

c_if(classical, val)[código fonte]#: Set a classical equality condition on this instruction between the register or cbit classical and value val.

Nota

This is a setter method, not an additive one. Calling this multiple times will silently override any previously set condition; it does not stack.

copy(name=None)#

Copy of the instruction.

Parâmetros:: name (str) – name to be given to the copied circuit, if None then the name stays the same.
Retorno:: a copy of the current instruction, with the name updated if it was provided
Tipo de retorno:: qiskit.circuit.Instruction

inverse()[código fonte]#: Special case. Return self.

is_parameterized()#: Return True .IFF. instruction is parameterized else False

qasm()#

Return a default OpenQASM string for the instruction.

Derived instructions may override this to print in a different format (e.g. measure q[0] -> c[0];).

Obsoleto desde a versão 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.

repeat(n)#

Creates an instruction with gate repeated n amount of times.

Parâmetros:: n (int) – Number of times to repeat the instruction
Retorno:: Containing the definition.
Tipo de retorno:: qiskit.circuit.Instruction
Levanta:: CircuitError – If n < 1.

reverse_ops()#

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.

Retorno:

a new instruction with: sub-instructions reversed.

Tipo de retorno:

qiskit.circuit.Instruction

soft_compare(other)#

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.

Parâmetros:: other (instruction) – other instruction.
Retorno:: are self and other equal up to parameter expressions.
Tipo de retorno:: bool

validate_parameter(parameter)#: Instruction parameters has no validation or normalization.