hidden slice_vars in distribute transpile, hidden it to users

python/paddle/fluid/io.py

@@ -895,14 +895,14 @@ def get_test_program(filelist, program=None, startup_program=None):
     return program
 
 
-def _load_slice_up_vars(executor, dirname, _slice_vars_and_atts):
-    if slice_vars == None or len(slice_vars) == 0:
+def _load_slice_up_vars(executor, dirname, slice_vars_and_atts):
+    if slice_vars_and_atts == None or len(slice_vars_and_atts) == 0:
         return
 
     load_prog = Program()
     load_block = load_prog.global_block()
 
-    for var_tuple in slice_vars:
+    for var_tuple in slice_vars_and_atts:
         orig_var = var_tuple[0]
         start = var_tuple[1]
         slice_var = var_tuple[2]

python/paddle/fluid/trainer.py

@@ -235,6 +235,9 @@ class Trainer(object):
         # config for checkpoint
         # only chief worker will save variables
         self.trainer_id = 0
+        self.pserver_id = None
+        self.pserver_endpoints = None
+        self.lookup_table_name = None
         self.checkpoint_cfg = checkpoint_config
         if self.checkpoint_cfg:
             assert isinstance(self.checkpoint_cfg, CheckpointConfig)
@@ -282,10 +285,12 @@ class Trainer(object):
 
         if param_path and os.path.isdir(param_path):
             # load params from param_path into scope
-            io.load_persistables(
-                executor=exe,
-                dirname=param_path,
-                main_program=self.startup_program)
+            _load_persistable_vars(exe, param_path, self.startup_program, False,
+                                   [self.lookup_table_name]
+                                   if self.lookup_table_name else [])
+            if self.lookup_table_name and self.pserver_id:
+                _load_lookup_table_vars(exe, param_path, self.startup_program,
+                                        self.pserver_id, self.lookup_table_name)
 
     def _transpile_nccl2_dist(self):
         # PADDLE_TRAINER_IPS