add logger

verl/utils/logger/aggregate_logger.py

@@ -0,0 +1,42 @@
+# Copyright 2024 Bytedance Ltd. and/or its affiliates
+#
+# 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.
+"""
+A Ray logger will receive logging info from different processes.
+"""
+import numbers
+from typing import Dict
+
+
+def concat_dict_to_str(dict: Dict, step):
+    output = [f'step:{step}']
+    for k, v in dict.items():
+        if isinstance(v, numbers.Number):
+            output.append(f'{k}:{v:.3f}')
+    output_str = ' - '.join(output)
+    return output_str
+
+
+class LocalLogger:
+
+    def __init__(self, remote_logger=None, enable_wandb=False, print_to_console=False):
+        self.print_to_console = print_to_console
+        if print_to_console:
+            print('Using LocalLogger is deprecated. The constructor API will change ')
+
+    def flush(self):
+        pass
+
+    def log(self, data, step):
+        if self.print_to_console:
+            print(concat_dict_to_str(data, step=step), flush=True)