QuantumRegister

class QuantumRegister(size=None, name=None, bits=None)

Bases: qiskit.circuit.register.Register

Implement a quantum register.

Create a new generic register.

Either the size or the bits argument must be provided. If size is not None, the register will be pre-populated with bits of the correct type.

Parameters

• size (int) – Optional. The number of bits to include in the register.

• name (str) – Optional. The name of the register. If not provided, a unique name will be auto-generated from the register type.

• bits (list[Bit]) – Optional. A list of Bit() instances to be used to populate the register.

Raises

• CircuitError – if both the size and bits arguments are provided, or if neither are.

• CircuitError – if size is not valid.

• CircuitError – if name is not a valid name according to the OpenQASM spec.

• CircuitError – if bits contained bits of an incorrect type.

Methods

qasm	Return OPENQASM string for this register.

Attributes

instances_counter = count(0)

name

Get the register name.

name_format = re.compile('[a-z][a-zA-Z0-9_]*')

prefix = 'q'

size

Get the register size.