diff --git a/python/paddle/__init__.py b/python/paddle/__init__.py
index 054fcdfcbe65152111cdf4037161e8cc4aa7e64c..ee4dcaa8979407ee0bcfc4e02af42c08c05efb03 100755
--- a/python/paddle/__init__.py
+++ b/python/paddle/__init__.py
@@ -269,10 +269,10 @@ from .fluid.layers import crop_tensor as crop  # noqa: F401
 
 # high-level api
 from .hapi import Model  # noqa: F401
-from .hapi import callbacks  # noqa: F401
+from . import callbacks  # noqa: F401
 from .hapi import summary  # noqa: F401
 from .hapi import flops  # noqa: F401
-from .hapi import hub  # noqa: F401
+from . import hub  # noqa: F401
 
 import paddle.text  # noqa: F401
 import paddle.vision  # noqa: F401
@@ -335,10 +335,8 @@ __all__ = [     #noqa
            'unsqueeze_',
            'argmax',
            'Model',
-           'callbacks',
            'summary',
            'flops',
-           'hub',
            'sort',
            'split',
            'logical_and',
diff --git a/python/paddle/callbacks.py b/python/paddle/callbacks.py
new file mode 100644
index 0000000000000000000000000000000000000000..08fab3e0adb5e559bb980500ad5ceebb59198281
--- /dev/null
+++ b/python/paddle/callbacks.py
@@ -0,0 +1,31 @@
+# Copyright (c) 2021 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 .hapi.callbacks import Callback  # noqa: F401
+from .hapi.callbacks import ProgBarLogger  # noqa: F401
+from .hapi.callbacks import ModelCheckpoint  # noqa: F401
+from .hapi.callbacks import VisualDL  # noqa: F401
+from .hapi.callbacks import LRScheduler  # noqa: F401
+from .hapi.callbacks import EarlyStopping  # noqa: F401
+from .hapi.callbacks import ReduceLROnPlateau  # noqa: F401
+
+__all__ = [  #noqa
+    'Callback',
+    'ProgBarLogger',
+    'ModelCheckpoint',
+    'VisualDL',
+    'LRScheduler',
+    'EarlyStopping',
+    'ReduceLROnPlateau'
+]
diff --git a/python/paddle/hapi/callbacks.py b/python/paddle/hapi/callbacks.py
index cd4b35ea29a83b1962ee93cdad152f82d30b362c..61ae8b42d63a909cc4dc88d4b16f0b0e8ed83c71 100644
--- a/python/paddle/hapi/callbacks.py
+++ b/python/paddle/hapi/callbacks.py
@@ -25,10 +25,7 @@ from paddle.utils import try_import
 
 from .progressbar import ProgressBar
 
-__all__ = [
-    'Callback', 'ProgBarLogger', 'ModelCheckpoint', 'VisualDL', 'LRScheduler',
-    'EarlyStopping', 'ReduceLROnPlateau'
-]
+__all__ = []
 
 
 def config_callbacks(callbacks=None,
diff --git a/python/paddle/hub.py b/python/paddle/hub.py
new file mode 100644
index 0000000000000000000000000000000000000000..acdb28cb6f08dfd51e9770c40283eb3f8d98a010
--- /dev/null
+++ b/python/paddle/hub.py
@@ -0,0 +1,21 @@
+# Copyright (c) 2021 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 .hapi.hub import list  # noqa: F401
+from .hapi.hub import help  # noqa: F401
+from .hapi.hub import load  # noqa: F401
+
+__all__ = [  #noqa
+    'list', 'help', 'load'
+]
diff --git a/python/paddle/nn/__init__.py b/python/paddle/nn/__init__.py
index 4e4669892b0f0a3333a71836e6fa459390965213..b5a6a5ca07384bdea48a98a95f1a71a8e7f9c071 100644
--- a/python/paddle/nn/__init__.py
+++ b/python/paddle/nn/__init__.py
@@ -232,10 +232,8 @@ __all__ = [     #noqa
            'MaxPool3D',
            'AdaptiveMaxPool2D',
            'Hardshrink',
-           'clip',
            'Softplus',
            'KLDivLoss',
-           'clip_by_norm',
            'AvgPool2D',
            'L1Loss',
            'LeakyReLU',
diff --git a/python/paddle/utils/__init__.py b/python/paddle/utils/__init__.py
index 40c9d415e11f1b6c8e194235b4ea18abf249b0b8..c23841ea8b802bfec28c2b293d6ac0d57f423d5b 100644
--- a/python/paddle/utils/__init__.py
+++ b/python/paddle/utils/__init__.py
@@ -19,18 +19,13 @@ from .deprecated import deprecated  # noqa: F401
 from .lazy_import import try_import  # noqa: F401
 from .op_version import OpLastCheckpointChecker  # noqa: F401
 from .install_check import run_check  # noqa: F401
-from ..fluid.framework import unique_name  # noqa: F401
+from . import unique_name  # noqa: F401
 from ..fluid.framework import require_version  # noqa: F401
 
 from . import download  # noqa: F401
 from . import image_util  # noqa: F401
 from . import cpp_extension  # noqa: F401
 
-__all__ = [     #noqa
-           'deprecated',
-           'download',
-           'run_check',
-           'unique_name',
-           'require_version',
-           'try_import'
+__all__ = [  #noqa
+    'deprecated', 'run_check', 'require_version', 'try_import'
 ]
diff --git a/python/paddle/utils/download.py b/python/paddle/utils/download.py
index ddd1dad9dbdf5a08270c9d28a8d4810722003e0e..dda8abeff21c062011ba7e558f330eb92c87836a 100644
--- a/python/paddle/utils/download.py
+++ b/python/paddle/utils/download.py
@@ -55,7 +55,7 @@ except:
 import logging
 logger = logging.getLogger(__name__)
 
-__all__ = []
+__all__ = ['get_weights_path_from_url']
 
 WEIGHTS_HOME = osp.expanduser("~/.cache/paddle/hapi/weights")
 
diff --git a/python/paddle/utils/unique_name.py b/python/paddle/utils/unique_name.py
new file mode 100644
index 0000000000000000000000000000000000000000..d0d487c933d767d4f1dca9642d5346bf97b7fe06
--- /dev/null
+++ b/python/paddle/utils/unique_name.py
@@ -0,0 +1,21 @@
+# Copyright (c) 2021 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.unique_name import generate  # noqa: F401
+from ..fluid.unique_name import switch  # noqa: F401
+from ..fluid.unique_name import guard  # noqa: F401
+
+__all__ = [  #noqa
+    'generate', 'switch', 'guard'
+]