Change jit.save/load configs to config & update code examples (#27056)

* change configs to config & update examples

* fix deprecate decorator conflict

python/paddle/fluid/dygraph/checkpoint.py

@@ -24,7 +24,7 @@ from . import learning_rate_scheduler
 import warnings
 from .. import core
 from .base import guard
-from paddle.fluid.dygraph.jit import SaveLoadConfig
+from paddle.fluid.dygraph.jit import SaveLoadConfig, deprecate_save_load_configs
 from paddle.fluid.dygraph.io import _construct_program_holders, _construct_params_and_buffers
 
 __all__ = [
@@ -42,9 +42,9 @@ def deprecate_keep_name_table(func):
             warnings.warn(
                 "The argument `keep_name_table` has deprecated, please use `SaveLoadConfig.keep_name_table`.",
                 DeprecationWarning)
-            configs = SaveLoadConfig()
-            configs.keep_name_table = keep_name_table
-            return configs
+            config = SaveLoadConfig()
+            config.keep_name_table = keep_name_table
+            return config
 
         # deal with arg `keep_name_table`
         if len(args) > 1 and isinstance(args[1], bool):
@@ -52,7 +52,7 @@ def deprecate_keep_name_table(func):
             args[1] = __warn_and_build_configs__(args[1])
         # deal with kwargs
         elif 'keep_name_table' in kwargs:
-            kwargs['configs'] = __warn_and_build_configs__(kwargs[
+            kwargs['config'] = __warn_and_build_configs__(kwargs[
                 'keep_name_table'])
             kwargs.pop('keep_name_table')
         else:
@@ -135,8 +135,9 @@ def save_dygraph(state_dict, model_path):
 # TODO(qingqing01): remove dygraph_only to support loading static model.
 # maybe need to unify the loading interface after 2.0 API is ready.
 # @dygraph_only
+@deprecate_save_load_configs
 @deprecate_keep_name_table
-def load_dygraph(model_path, configs=None):
+def load_dygraph(model_path, config=None):
     '''
     :api_attr: imperative
     
@@ -151,7 +152,7 @@ def load_dygraph(model_path, configs=None):
     Args:
         model_path(str) : The file prefix store the state_dict. 
             (The path should Not contain suffix '.pdparams') 
-        configs (SaveLoadConfig, optional): :ref:`api_imperative_jit_saveLoadConfig`
+        config (SaveLoadConfig, optional): :ref:`api_imperative_jit_saveLoadConfig`
             object that specifies additional configuration options, these options 
             are for compatibility with ``jit.save/io.save_inference_model`` formats. 
             Default None.
@@ -195,6 +196,7 @@ def load_dygraph(model_path, configs=None):
     opti_file_path = model_prefix + ".pdopt"
 
     # deal with argument `configs`
+    configs = config
     if configs is None:
         configs = SaveLoadConfig()