qiskit/releasenotes/notes/0.19/qpy-v2-f1c380b40936cccf.yaml

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YAML

---
features:
- |
QPY serialization is now capable of representing
:attr:`~qiskit.circuit.QuantumCircuit.global_phase` attributes of a
:class:`~qiskit.circuit.QuantumCircuit` object that are an ``int``,
:class:`~qiskit.circuit.Parameter` object, or
:class:`~qiskit.circuit.ParameterExpression` object. Previous versions of
QPY would only accept a :attr:`~qiskit.circuit.QuantumCircuit.global_phase`
that was a ``float``.
This requires the QPY format :ref:`qpy_version_2` which was introduced in
this release to represent the additional types.