add alias for fluid.contrib.mixed_precision (#29562)

* add alias for fluid.contrib.mixed_precision

python/paddle/fluid/contrib/mixed_precision/__init__.py

@@ -13,9 +13,14 @@
 # limitations under the License.
 
 from __future__ import print_function
+
 from . import decorator
 from .decorator import *
-from .fp16_lists import AutoMixedPrecisionLists
+from . import fp16_lists
+from .fp16_lists import *
+from . import fp16_utils
+from .fp16_utils import *
 
 __all__ = decorator.__all__
 __all__ += fp16_lists.__all__
+__all__ += fp16_utils.__all__

python/paddle/fluid/contrib/mixed_precision/fp16_utils.py

@@ -20,6 +20,9 @@ from ... import global_scope
 from ...log_helper import get_logger
 import logging
 import numpy as np
+
+__all__ = ["cast_model_to_fp16", "cast_parameters_to_fp16"]
+
 _logger = get_logger(
     __name__, logging.INFO, fmt='%(asctime)s-%(levelname)s: %(message)s')
 

python/paddle/static/amp/__init__.py

@@ -0,0 +1,18 @@
+# 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 ...fluid.contrib import mixed_precision
+from ...fluid.contrib.mixed_precision import *
+
+__all__ = mixed_precision.__all__