add dygraph doc

1.add dygraph api doc
2.add dygraph node

doc/fluid/api/dygraph.rst

+..  THIS FILE IS GENERATED BY `gen_doc.{py|sh}`
+    !DO NOT EDIT THIS FILE MANUALLY!
+
+=============
+fluid.dygraph
+=============
+
+.. _api_fluid_dygraph_BackwardStrategy:
+
+BackwardStrategy
+----------------
+
+..  autoclass:: paddle.fluid.dygraph.BackwardStrategy
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_BatchNorm:
+
+BatchNorm
+---------
+
+..  autoclass:: paddle.fluid.dygraph.BatchNorm
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_BilinearTensorProduct:
+
+BilinearTensorProduct
+---------------------
+
+..  autoclass:: paddle.fluid.dygraph.BilinearTensorProduct
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_Conv2D:
+
+Conv2D
+------
+
+..  autoclass:: paddle.fluid.dygraph.Conv2D
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_Conv2DTranspose:
+
+Conv2DTranspose
+---------------
+
+..  autoclass:: paddle.fluid.dygraph.Conv2DTranspose
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_Conv3D:
+
+Conv3D
+------
+
+..  autoclass:: paddle.fluid.dygraph.Conv3D
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_Conv3DTranspose:
+
+Conv3DTranspose
+---------------
+
+..  autoclass:: paddle.fluid.dygraph.Conv3DTranspose
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_CosineDecay:
+
+CosineDecay
+-----------
+
+..  autoclass:: paddle.fluid.dygraph.CosineDecay
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_Embedding:
+
+Embedding
+---------
+
+..  autoclass:: paddle.fluid.dygraph.Embedding
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_enabled:
+
+enabled
+-------
+
+..  autofunction:: paddle.fluid.dygraph.enabled
+    :noindex:
+
+.. _api_fluid_dygraph_ExponentialDecay:
+
+ExponentialDecay
+----------------
+
+..  autoclass:: paddle.fluid.dygraph.ExponentialDecay
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_FC:
+
+FC
+--
+
+..  autoclass:: paddle.fluid.dygraph.FC
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_GroupNorm:
+
+GroupNorm
+---------
+
+..  autoclass:: paddle.fluid.dygraph.GroupNorm
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_GRUUnit:
+
+GRUUnit
+-------
+
+..  autoclass:: paddle.fluid.dygraph.GRUUnit
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_guard:
+
+guard
+-----
+
+..  autofunction:: paddle.fluid.dygraph.guard
+    :noindex:
+
+.. _api_fluid_dygraph_InverseTimeDecay:
+
+InverseTimeDecay
+----------------
+
+..  autoclass:: paddle.fluid.dygraph.InverseTimeDecay
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_Layer:
+
+Layer
+-----
+
+..  autoclass:: paddle.fluid.dygraph.Layer
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_LayerNorm:
+
+LayerNorm
+---------
+
+..  autoclass:: paddle.fluid.dygraph.LayerNorm
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_load_persistables:
+
+load_persistables
+-----------------
+
+..  autofunction:: paddle.fluid.dygraph.load_persistables
+    :noindex:
+
+.. _api_fluid_dygraph_NaturalExpDecay:
+
+NaturalExpDecay
+---------------
+
+..  autoclass:: paddle.fluid.dygraph.NaturalExpDecay
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_NCE:
+
+NCE
+---
+
+..  autoclass:: paddle.fluid.dygraph.NCE
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_no_grad:
+
+no_grad
+-------
+
+..  autofunction:: paddle.fluid.dygraph.no_grad
+    :noindex:
+
+.. _api_fluid_dygraph_NoamDecay:
+
+NoamDecay
+---------
+
+..  autoclass:: paddle.fluid.dygraph.NoamDecay
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_not_support:
+
+not_support
+-----------
+
+..  autofunction:: paddle.fluid.dygraph.not_support
+    :noindex:
+
+.. _api_fluid_dygraph_PiecewiseDecay:
+
+PiecewiseDecay
+--------------
+
+..  autoclass:: paddle.fluid.dygraph.PiecewiseDecay
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_PolynomialDecay:
+
+PolynomialDecay
+---------------
+
+..  autoclass:: paddle.fluid.dygraph.PolynomialDecay
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_Pool2D:
+
+Pool2D
+------
+
+..  autoclass:: paddle.fluid.dygraph.Pool2D
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_PRelu:
+
+PRelu
+-----
+
+..  autoclass:: paddle.fluid.dygraph.PRelu
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_prepare_context:
+
+prepare_context
+---------------
+
+..  autofunction:: paddle.fluid.dygraph.prepare_context
+    :noindex:
+
+.. _api_fluid_dygraph_save_persistables:
+
+save_persistables
+-----------------
+
+..  autofunction:: paddle.fluid.dygraph.save_persistables
+    :noindex:
+
+.. _api_fluid_dygraph_SpectralNorm:
+
+SpectralNorm
+------------
+
+..  autoclass:: paddle.fluid.dygraph.SpectralNorm
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_start_gperf_profiler:
+
+start_gperf_profiler
+--------------------
+
+..  autofunction:: paddle.fluid.dygraph.start_gperf_profiler
+    :noindex:
+
+.. _api_fluid_dygraph_stop_gperf_profiler:
+
+stop_gperf_profiler
+-------------------
+
+..  autofunction:: paddle.fluid.dygraph.stop_gperf_profiler
+    :noindex:
+
+.. _api_fluid_dygraph_to_variable:
+
+to_variable
+-----------
+
+..  autofunction:: paddle.fluid.dygraph.to_variable
+    :noindex:
+
+.. _api_fluid_dygraph_Tracer:
+
+Tracer
+------
+
+..  autoclass:: paddle.fluid.dygraph.Tracer
+    :members:
+    :inherited-members:
+    :noindex:
+
+.. _api_fluid_dygraph_TreeConv:
+
+TreeConv
+--------
+
+..  autoclass:: paddle.fluid.dygraph.TreeConv
+    :members:
+    :inherited-members:
+    :noindex:
+

doc/fluid/api/gen_doc.sh

@@ -10,7 +10,7 @@ do
   python gen_doc.py --module_name layers.${module} --module_prefix layers --output layers/${module}.rst
 done 
 
-for module in data_feeder dataset clip metrics executor initializer io nets optimizer profiler regularizer transpiler recordio_writer backward average profiler unique_name
+for module in data_feeder dataset clip metrics executor initializer io nets optimizer profiler regularizer transpiler recordio_writer backward average profiler unique_name dygraph
 do
   python gen_doc.py --module_name ${module} --module_prefix ${module} --output ${module}.rst
 done

doc/fluid/api/index_en.rst

@@ -15,6 +15,7 @@ API Reference
     data/dataset.rst
     data_feeder.rst
     dataset.rst
+    dygraph.rst
     executor.rst
     initializer.rst
     io.rst