Add future imports

cirq-superstaq/cirq_superstaq/qcvv/base_experiment.py

@@ -1,5 +1,18 @@
+# Copyright 2021 The Cirq Developers
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 """Base experiment class and tools used across all experiments.
 """
+from __future__ import annotations
 
 import warnings
 from abc import ABC, abstractmethod

cirq-superstaq/cirq_superstaq/qcvv/base_experiment_test.py

@@ -1,6 +1,21 @@
+# Copyright 2021 The Cirq Developers
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 # pylint: disable=missing-function-docstring
 # mypy: disable-error-code=method-assign
 
+from __future__ import annotations
+
 import os
 from typing import NamedTuple
 from unittest.mock import MagicMock, call, patch