【Fix en docs】 Fix document formatting*test=document_fix (#43996)

* Update creation.py

修复Returns格式问题

* 【Fix en docs】 Fix document formatting

修复Returns和Return Type格式问题。

* 修复格式，解决中英文文档不一致问题

为了解决中英文不一致的问题，统一将Returns内容第一个标点符号改成逗号。删掉Return Type

* fix大量 与 Return Type 和 Return相关的文档

* Convert Variable and LoDTensor to Tensor

* Update python/paddle/nn/functional/common.py

Co-authored-by: Nyakku Shigure <sigure.qaq@gmail.com>

* Update detection.py

* Update io.py

* Update io.py

* Update loss.py

* Update loss.py

* Update io.py

* Update io.py

* Update nn.py

* Update nn.py

* Update nn.py

* Update nn.py

* Update nn.py

* Update nn.py

* Update nn.py

* Update nn.py

* Update nn.py

* Update nn.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update sequence_lod.py

* Update metrics.py

* Update metrics.py

* Update metrics.py

* Update metrics.py

* Update metrics.py

* Update nets.py

* Update reader.py

* Update nn.py

* Update io.py

* Update nn.py

* Update io.py

* remove Return Type to Returns

* Update sequence_lod.py

* Update sequence_lod.py

* Update common.py

* Update common.py

* Update extension.py

* Update creation.py

* update*test=document_fix

* Update io.py

* Update manipulation.py

* Update sequence_lod.py

* Update common.py

* Update common.py

* Update common.py

* Update common.py

* update*test=document_fix

* update*test=document_fix

* Update loss.py

* Update loss.py

* update*test=document_fix

* paddle.crop

* for ci;test=document_fix

* update io;test=document_fix

* Update io.py

* update sequence_expand docs;test=document_fix

* update note typos;test=document_fix

Co-authored-by: Nyakku Shigure <sigure.qaq@gmail.com>
Co-authored-by: Ligoml <39876205+Ligoml@users.noreply.github.com>

python/paddle/fluid/io.py

@@ -184,8 +184,6 @@ def is_belong_to_optimizer(var):
 @dygraph_not_support
 def get_program_parameter(program):
     """
-    :api_attr: Static Graph
-
     Get all the parameters from Program.
 
     Args:
@@ -212,8 +210,6 @@ def get_program_parameter(program):
 @dygraph_not_support
 def get_program_persistable_vars(program):
     """
-    :api_attr: Static Graph
-
     Get all the persistable vars from Program.
 
     Args:
@@ -292,9 +288,7 @@ def save_vars(executor,
               predicate=None,
               filename=None):
     """
-    :api_attr: Static Graph
-
-    This API saves specific variables in the `Program` to files.
+    Save specific variables in the `Program` to files.
 
     There are two ways to specify the variables to be saved: set variables in
     a list and assign it to the `vars`, or use the `predicate` function to select
@@ -436,9 +430,7 @@ def name_has_fc(var):
 @dygraph_not_support
 def save_params(executor, dirname, main_program=None, filename=None):
     """
-    :api_attr: Static Graph
-
-    This operator saves all parameters from the :code:`main_program` to
+    Save all parameters from the :code:`main_program` to
     the folder :code:`dirname` or file :code:`filename`. You can refer to
     :ref:`api_guide_model_save_reader_en` for more details.
 
@@ -670,9 +662,7 @@ def is_valid(var):
 @dygraph_not_support
 def save_persistables(executor, dirname, main_program=None, filename=None):
     """
-    :api_attr: Static Graph
-
-    This operator saves all persistable variables from :code:`main_program` to 
+    Save all persistable variables from :code:`main_program` to 
     the folder :code:`dirname` or file :code:`filename`. You can refer to 
     :ref:`api_guide_model_save_reader_en` for more details. And then
     saves these persistables variables to the folder :code:`dirname` or file
@@ -780,9 +770,6 @@ def load_vars(executor,
     Returns:
         None
 
-    Raises:
-        TypeError: If `main_program` is not an instance of Program nor None.
-
     Examples:
         .. code-block:: python
 
@@ -1247,8 +1234,6 @@ def save_inference_model(dirname,
                          program_only=False,
                          clip_extra=False):
     """
-    :api_attr: Static Graph
-
     Prune the given `main_program` to build a new program especially for inference,
     and then save it and all related parameters to given `dirname` .
     If you just want to save parameters of your trained model, please use the
@@ -1279,7 +1264,7 @@ def save_inference_model(dirname,
         params_filename(str, optional): The name of file to save all related parameters.
                                         If it is set None, parameters will be saved
                                         in separate files .
-        export_for_deployment(bool): If True, programs are modified to only support
+        export_for_deployment(bool, optional): If True, programs are modified to only support
                                      direct inference deployment. Otherwise,
                                      more information will be stored for flexible
                                      optimization and re-training. Currently, only
@@ -1290,14 +1275,7 @@ def save_inference_model(dirname,
                                       Default: False.
 
     Returns:
-        The fetch variables' name list
-
-     Return Type:
-        list
-
-    Raises:
-        ValueError: If `feed_var_names` is not a list of basestring, an exception is thrown.
-        ValueError: If `target_vars` is not a list of Variable, an exception is thrown.
+        list, The fetch variables' name list.
 
     Examples:
         .. code-block:: python
@@ -1462,8 +1440,6 @@ def load_inference_model(dirname,
                          params_filename=None,
                          pserver_endpoints=None):
     """
-    :api_attr: Static Graph
-
     Load the inference model from a given directory. By this API, you can get the model
     structure(Inference Program) and model parameters. If you just want to load
     parameters of the pre-trained model, please use the :ref:`api_fluid_io_load_params` API.
@@ -1501,8 +1477,6 @@ def load_inference_model(dirname,
         ``Variable`` (refer to :ref:`api_guide_Program_en`). It contains variables from which
         we can get inference results.
 
-    Raises:
-        ValueError: If `dirname` is not a existing directory.
 
     Examples:
         .. code-block:: python
@@ -1659,12 +1633,6 @@ def get_parameter_value_by_name(name, executor, program=None):
     Returns:
         numpy.array: The parameter's values.
 
-    Raises:
-        TypeError: If given `name` is not an instance of basestring.
-        TypeError: If the parameter with the given name doesn't exist.
-        AssertionError: If there is a variable named `name` in the
-                        given program but it is not a Parameter.
-
     Examples:
         .. code-block:: python
 
@@ -2314,8 +2282,6 @@ def _load_vars_with_try_catch(exe,
 @static_only
 def set_program_state(program, state_dict):
     """
-    :api_attr: Static Graph
-
     Set program parameter from state_dict
 
     An exception will throw if shape or dtype of the parameters is not match.

python/paddle/fluid/layers/loss.py

@@ -311,7 +311,7 @@ def cross_entropy2(input, label, ignore_index=kIgnoreIndex):
 def square_error_cost(input, label):
     r"""
 
-    This op accepts input predictions and target label and returns the
+    Accept input predictions and target label and returns the
     squared error cost.
 
     For predictions label, and target label, the equation is:
@@ -325,10 +325,8 @@ def square_error_cost(input, label):
         label (Tensor): Label tensor, the data type should be float32.
 
     Returns:
-        The tensor storing the element-wise squared error \
-                  difference between input and label.
-
-    Return type: Tensor.
+        Tensor, The tensor storing the element-wise squared 
+        error difference between input and label.
 
     Examples:
 

python/paddle/fluid/layers/nn.py

@@ -9359,14 +9359,14 @@ def crop(x, shape=None, offsets=None, name=None):
 
     Parameters:
         x (Variable): Tensor, data type can be float32 or float64.
-        shape (Variable|list/tuple of integers): The output shape is specified
+        shape (Variable|list/tuple of integers, optional): The output shape is specified
             by `shape`, which can be a Tensor or a list/tuple of integers.
             If it is a Tensor, it's rank must be the same as `x` , only
             it's shape will be used, and the value of it will be ignored. This way
             is suitable for the case that the output shape may be changed each
             iteration. If it is a list/tuple of integers, it's length must be the same
             as the rank of `x`
-        offsets (Variable|list/tuple of integers|None): Specifies the cropping
+        offsets (Variable|list/tuple of integers|None, optional): Specifies the cropping
             offsets at each dimension. It can be a Tensor or a list/tuple
             of integers. If it is a Tensor, it's rank must be the same as `x`.
             This way is suitable for the case that the offsets may be changed
@@ -9377,13 +9377,7 @@ def crop(x, shape=None, offsets=None, name=None):
             None by default.
 
     Returns:
-        The cropped Tensor, which has the same rank and data type with `x`
-
-    Return Type:
-        Variable
-
-    Raises:
-        ValueError: If shape is not a list, tuple or Variable.
+        Tensor, The cropped Tensor, which has the same rank and data type with `x`.
 
     Examples:
 
@@ -9721,7 +9715,8 @@ def pad2d(input,
         name (str, optional) : The default value is None.  Normally there is no need for
                     user to set this property.  For more information, please refer to :ref:`api_guide_Name` .
 
-    Returns: Tensor, a 4-D Tensor padded according to paddings and mode and data type is same as input.
+    Returns: 
+        Tensor, a 4-D Tensor padded according to paddings and mode and data type is same as input.
 
     Examples:
         .. code-block:: text
@@ -13282,14 +13277,10 @@ def space_to_depth(x, blocksize, name=None):
             to :ref:`api_guide_Name`. Usually name is no need to set and \
             None by default.
 
-    Returns: The output, which should be 4 dims Tensor or LodTensor, with the shape \
+    Returns: 
+            Tensor, The output, which should be 4 dims Tensor or LodTensor, with the shape \
             [batch, channel * blocksize * blocksize, height/blocksize, width/blocksize]
 
-    Return Type: Variable
-
-    Raises:
-        TypeError: blocksize type must be int64.
-
     Examples:
         .. code-block:: python