Provider class was deprecated in qiskit 1.1

[1ucian0]

qiskit-experiments uses Provider abstract class significantly. In the cases I checked, it seems to use it as part of the Backend property to get account and job data.

In qiskit 1.1, upstream decided to deprecate the class and they are going to remove it in qiskit 2.0 (coming in 1Q2025).

[wshanks]

Ah, I see why this hasn't raised a deprecation warning in the tests:

qiskit-experiments/qiskit_experiments/test/fake_backend.py

Lines 26 to 45 in 519bb53

	class FakeProvider(ProviderV1):
	"""Fake provider with no backends for testing"""
	def backends(self, name=None, **kwargs):
	"""List of available backends. Empty in this case"""
	return []
	class FakeBackend(BackendV2):
	"""
	Fake backend for test purposes only.
	"""
	def __init__(
	self,
	provider=FakeProvider(),
	backend_name="fake_backend",
	num_qubits=1,
	max_experiments=100,
	):

ProviderV1 only gets instantiated as the default keyword argument to FakeBackend, so that happens at import time before the tests start running and set the warnings filter to raise an exception on deprecation warnings, and maybe before the tests set deprecation warnings to be visible? I don't see a warning at all for the provider.