chore: import upstream snapshot with attribution

python/paddle/utils/op_version.py

@@ -0,0 +1,71 @@
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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.
+
+from ..base import core
+
+__all__ = []
+
+
+def Singleton(cls):
+    _instance = {}
+
+    def _singleton(*args, **kargs):
+        if cls not in _instance:
+            _instance[cls] = cls(*args, **kargs)
+        return _instance[cls]
+
+    return _singleton
+
+
+class OpUpdateInfoHelper:
+    def __init__(self, info):
+        self._info = info
+
+    def verify_key_value(self, name=''):
+        result = False
+        key_funcs = {
+            core.OpAttrInfo: 'name',
+            core.OpInputOutputInfo: 'name',
+        }
+        if name == '':
+            result = True
+        elif type(self._info) in key_funcs:
+            if getattr(self._info, key_funcs[type(self._info)])() == name:
+                result = True
+        return result
+
+
+@Singleton
+class OpLastCheckpointChecker:
+    def __init__(self):
+        self.raw_version_map = core.get_op_version_map()
+        self.checkpoints_map = {}
+        self._construct_map()
+
+    def _construct_map(self):
+        for op_name in self.raw_version_map:
+            last_checkpoint = self.raw_version_map[op_name].checkpoints()[-1]
+            infos = last_checkpoint.version_desc().infos()
+            self.checkpoints_map[op_name] = infos
+
+    def filter_updates(self, op_name, type=core.OpUpdateType.kInvalid, key=''):
+        updates = []
+        if op_name in self.checkpoints_map:
+            for update in self.checkpoints_map[op_name]:
+                if (update.type() == type) or (
+                    type == core.OpUpdateType.kInvalid
+                ):
+                    if OpUpdateInfoHelper(update.info()).verify_key_value(key):
+                        updates.append(update.info())
+        return updates