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QuantumRegister
class qiskit.circuit.QuantumRegister(size=None, name=None, bits=None)
Bases: 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
andbits
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.
Attributes
instances_counter
Default value: count(6)
name
Get the register name.
name_format
Default value: re.compile('[a-z][a-zA-Z0-9_]*')
prefix
Default value: 'q'
size
Get the register size.
Methods
index
index(bit)
Find the index of the provided bit within this register.
qasm
qasm()
Return OPENQASM string for this register.
Deprecated since version 0.23.0
The method qiskit.circuit.quantumregister.QuantumRegister.qasm()
is deprecated as of qiskit-terra 0.23.0. 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.
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