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QuantumRegister

class QuantumRegister(size=None, name=None, bits=None)[source]

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 duplicated bits.

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

Methods

index

Find the index of the provided bit within this register.

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.