Fix meta-cfr example (add missing headers, use absltest)

PiperOrigin-RevId: 486629244
Change-Id: I3ca67b6cf7e32344e8707bc36d59f482e5024bda

open_spiel/python/examples/meta_cfr/sequential_games/cfr.py

@@ -1,3 +1,17 @@
+# Copyright 2022 DeepMind Technologies Limited
+#
+# 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
+#
+#      http://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.
+
 """Counterfactual Regret Minimization."""
 
 import copy

open_spiel/python/examples/meta_cfr/sequential_games/cfr_test.py

@@ -1,9 +1,25 @@
+# Copyright 2022 DeepMind Technologies Limited
+#
+# 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
+#
+#      http://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.
+
 """Tests counterfactual regret minimization."""
+
+from absl.testing import absltest
+from absl.testing import parameterized
+
 from open_spiel.python.examples.meta_cfr.sequential_games import cfr
 from open_spiel.python.examples.meta_cfr.sequential_games import game_tree_utils as trees
 from open_spiel.python.examples.meta_cfr.sequential_games import openspiel_api
-from google3.testing.pybase import googletest
-from google3.testing.pybase import parameterized
 
 
 def _uniform_policy(size):
@@ -67,4 +83,4 @@ def test_cfr_kuhn_poker(self):
 
 
 if __name__ == '__main__':
-  googletest.main()
+  absltest.main()

open_spiel/python/examples/meta_cfr/sequential_games/dataset_generator.py

@@ -1,3 +1,17 @@
+# Copyright 2022 DeepMind Technologies Limited
+#
+# 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
+#
+#      http://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.
+
 """Dataset generation for meta-CFR algorithm."""
 
 from typing import List, Tuple

open_spiel/python/examples/meta_cfr/sequential_games/game_tree_utils.py

@@ -1,4 +1,19 @@
+# Copyright 2022 DeepMind Technologies Limited
+#
+# 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
+#
+#      http://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.
+
 """Game tree structure for imperfect information games."""
+
 import copy
 from typing import Any, Dict, List, Text, Tuple
 

open_spiel/python/examples/meta_cfr/sequential_games/models.py

@@ -1,4 +1,19 @@
+# Copyright 2022 DeepMind Technologies Limited
+#
+# 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
+#
+#      http://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.
+
 """Model definitions for optimizer network."""
+
 import enum
 from typing import Any, Callable, List, Optional, Union
 

open_spiel/python/examples/meta_cfr/sequential_games/openspiel_api.py

@@ -1,4 +1,19 @@
+# Copyright 2022 DeepMind Technologies Limited
+#
+# 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
+#
+#      http://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.
+
 """OpenSpiel API."""
+
 import random
 from typing import Any, List, Text, Tuple, Dict
 

open_spiel/python/examples/meta_cfr/sequential_games/typing.py

@@ -1,4 +1,19 @@
+# Copyright 2022 DeepMind Technologies Limited
+#
+# 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
+#
+#      http://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.
+
 """Typing definitions."""
+
 from typing import Any, Dict, Callable
 import jax.numpy as jnp
 import optax

open_spiel/python/examples/meta_cfr/sequential_games/utils.py

@@ -1,4 +1,19 @@
+# Copyright 2022 DeepMind Technologies Limited
+#
+# 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
+#
+#      http://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.
+
 """Utility functions for meta-cfr algorithm."""
+
 import functools
 from typing import List
 import haiku as hk

open_spiel/python/examples/meta_cfr/sequential_games/world_representation.py

@@ -1,4 +1,19 @@
+# Copyright 2022 DeepMind Technologies Limited
+#
+# 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
+#
+#      http://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.
+
 """API for world state representation."""
+
 import abc
 from typing import Any, List, Text, Tuple