[UPDATE FLUID API] PaddleRec-related only (#43862)

* [UPDATE FLUID API] only reference in paddlerec

* change lr

* [UPDATE FLUID API] only reference in paddlerec

* update by reviews

python/paddle/__init__.py

@@ -35,6 +35,7 @@ from .framework import set_flags  # noqa: F401
 from .framework import disable_static  # noqa: F401
 from .framework import enable_static  # noqa: F401
 from .framework import in_dynamic_mode  # noqa: F401
+from .fluid.dataset import *  # noqa: F401
 
 from .framework.dtype import dtype as dtype  # noqa: F401
 from .framework.dtype import uint8  # noqa: F401

python/paddle/incubate/__init__.py

@@ -35,6 +35,8 @@ from . import sparse  #noqa: F401
 from . import nn  #noqa: F401
 from . import asp  #noqa: F401
 
+from ..fluid.incubate import fleet
+
 __all__ = [
     'LookAhead',
     'ModelAverage',

python/paddle/static/__init__.py

@@ -64,11 +64,14 @@ from ..fluid.io import set_program_state  # noqa: F401
 
 from ..fluid.io import load_vars  # noqa: F401
 from ..fluid.io import save_vars  # noqa: F401
+from ..fluid.io import batch  # noqa: F401
 
 from ..fluid.layers import create_parameter  # noqa: F401
 from ..fluid.layers import create_global_var  # noqa: F401
 from ..fluid.layers.metric_op import auc  # noqa: F401
 from ..fluid.layers.metric_op import accuracy  # noqa: F401
+from ..fluid.contrib.layers import ctr_metric_bundle  # noqa: F401
+from ..fluid.layers import exponential_decay  # noqa: F401
 
 __all__ = [  #noqa
     'append_backward', 'gradients', 'Executor', 'global_scope', 'scope_guard',
@@ -82,5 +85,6 @@ __all__ = [  #noqa
     'deserialize_persistables', 'load_from_file', 'normalize_program',
     'load_program_state', 'set_program_state', 'cpu_places', 'cuda_places',
     'xpu_places', 'npu_places', 'mlu_places', 'Variable', 'create_global_var',
-    'accuracy', 'auc', 'device_guard', 'create_parameter', 'set_ipu_shard'
+    'accuracy', 'auc', 'device_guard', 'create_parameter', 'set_ipu_shard',
+    'ctr_metric_bundle', 'exponential_decay'
 ]

python/paddle/static/nn/__init__.py

@@ -41,6 +41,7 @@ from ...fluid.layers import while_loop  # noqa: F401
 from ...fluid.input import embedding  # noqa: F401
 from ...fluid.contrib.layers import sparse_embedding  # noqa: F401
 from ...fluid.layers import continuous_value_model  # noqa: F401
+from ...fluid.layers import StaticRNN  # noqa: F401
 
 from ...fluid.layers.sequence_lod import sequence_conv  # noqa: F401
 from ...fluid.layers.sequence_lod import sequence_softmax  # noqa: F401
@@ -99,4 +100,5 @@ __all__ = [  #noqa
     'sequence_scatter',
     'sequence_enumerate',
     'sequence_reverse',
+    'StaticRNN',
 ]