qiskit/releasenotes/notes/0.16/ancillas-in-functional-paul...

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---
deprecations:
- |
The
:attr:`~qiskit.circuit.library.PiecewiseLinearPauliRotations.num_ancilla_qubits`
property of the :class:`~qiskit.circuit.library.PiecewiseLinearPauliRotations`
and :class:`~qiskit.circuit.library.PolynomialPauliRotations` classes has been
deprecated and will be removed in a future release. Instead the property
:attr:`~qiskit.circuit.library.PolynomialPauliRotations.num_ancillas` should
be used instead. This was done to make it consistent with the
:class:`~qiskit.circuit.QuantumCircuit` method
:meth:`~qiskit.circuit.QuantumCircuit.num_ancillas`.