hide variable API (#12307)

* hide variable API

* edit API.spec

Author: typhoonzero

paddle/fluid/API.spec

@@ -1,8 +1,3 @@
-paddle.fluid.Variable.__init__ ArgSpec(args=['self', 'block', 'type', 'name', 'shape', 'dtype', 'lod_level', 'capacity', 'persistable', 'error_clip', 'stop_gradient', 'is_data'], varargs=None, keywords='kwargs', defaults=(VarType.LOD_TENSOR, None, None, None, None, None, None, None, False, False))
-paddle.fluid.Variable.astype ArgSpec(args=['self', 'dtype'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.Variable.set_desc ArgSpec(args=['self', 'input'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.Variable.set_error_clip ArgSpec(args=['self', 'error_clip'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.Variable.to_string ArgSpec(args=['self', 'throw_on_error', 'with_details'], varargs=None, keywords=None, defaults=(False,))
 paddle.fluid.Program.__init__ ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.Program.block ArgSpec(args=['self', 'index'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.Program.clone ArgSpec(args=['self', 'for_test'], varargs=None, keywords=None, defaults=(False,))
@@ -33,8 +28,6 @@ paddle.fluid.Operator.set_attr ArgSpec(args=['self', 'name', 'val'], varargs=Non
 paddle.fluid.Operator.to_string ArgSpec(args=['self', 'throw_on_error'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.Parameter.__init__ ArgSpec(args=['self', 'block', 'shape', 'dtype'], varargs=None, keywords='kwargs', defaults=None)
 paddle.fluid.Parameter.astype ArgSpec(args=['self', 'dtype'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.Parameter.set_desc ArgSpec(args=['self', 'input'], varargs=None, keywords=None, defaults=None)
-paddle.fluid.Parameter.set_error_clip ArgSpec(args=['self', 'error_clip'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.Parameter.to_string ArgSpec(args=['self', 'throw_on_error', 'with_details'], varargs=None, keywords=None, defaults=(False,))
 paddle.fluid.default_startup_program ArgSpec(args=[], varargs=None, keywords=None, defaults=None)
 paddle.fluid.default_main_program ArgSpec(args=[], varargs=None, keywords=None, defaults=None)

python/paddle/fluid/framework.py

@@ -32,7 +32,6 @@
 import unique_name
 
 __all__ = [
-    'Variable',
     'Program',
     'Operator',
     'Parameter',
@@ -302,7 +301,7 @@ def to_string(self, throw_on_error, with_details=False):
 
     __repr__ = __str__
 
-    def set_desc(self, input):
+    def _set_desc(self, input):
         """
         Set the variable description.
 
@@ -347,7 +346,7 @@ def lod_level(self):
     def type(self):
         return self.desc.type()
 
-    def set_error_clip(self, error_clip):
+    def _set_error_clip(self, error_clip):
         """
         Set the error_clip.
 

python/paddle/fluid/tests/test_error_clip.py

@@ -36,7 +36,7 @@
     avg_cost = fluid.layers.mean(cost)
 
 prog_clip = prog.clone()
-prog_clip.block(0).var(hidden1.name).set_error_clip(
+prog_clip.block(0).var(hidden1.name)._set_error_clip(
     fluid.clip.ErrorClipByValue(
         max=CLIP_MAX, min=CLIP_MIN))
 

python/paddle/fluid/tests/unittests/op_test.py

@@ -251,7 +251,7 @@ def _calc_output(self, place, parallel=False):
             for out_name, out_dup in Operator.get_op_outputs(self.op_type):
                 fetch_list.append(str(out_name))
         # fetch_list = map(block.var, fetch_list)
-        if not isinstance(fetch_list[0], Variable):
+        if not isinstance(fetch_list[0], fluid.framework.Variable):
             fetch_list = map(block.var, fetch_list)
         outs = executor.run(program,
                             feed=feed_map,

python/paddle/fluid/tests/unittests/test_parallel_op.py

@@ -120,7 +120,7 @@ def _run_test_impl_(self,
                 pd = fluid.layers.ParallelDo(places, use_nccl=use_nccl)
                 data = next(generator)
 
-                if isinstance(data, fluid.Variable):
+                if isinstance(data, fluid.framework.Variable):
                     data = [data]
 
                 with pd.do():

python/paddle/fluid/transpiler/distribute_transpiler.py

@@ -38,7 +38,7 @@
 from .. import core, framework
 from ..framework import Program, default_main_program, \
                         default_startup_program, Block, \
-                        Variable, Parameter, grad_var_name
+                        Parameter, grad_var_name
 from details import *
 
 LOOKUP_TABLE_TYPE = "lookup_table"
@@ -1044,7 +1044,6 @@ def create_splited_vars(self, source_var, block, tag):
         ]
 
     def _clone_var(self, block, var, persistable=True):
-        assert isinstance(var, Variable)
         return block.create_var(
             name=var.name,
             shape=var.shape,

python/paddle/fluid/transpiler/memory_optimization_transpiler.py

@@ -14,7 +14,7 @@
 
 from collections import defaultdict
 from .. import core
-from ..framework import Program, default_main_program, Parameter, Variable
+from ..framework import Program, default_main_program, Parameter
 from ..backward import _rename_arg_
 
 dtype_to_size = {