remove unnecesary code

test=develop

paddle/fluid/pybind/pybind.cc

@@ -572,20 +572,6 @@ All parameter, weight, gradient are variables in Paddle.
 
   py::class_<platform::Place>(m, "Place")
       .def(py::init<>())
-      .def("is_cpu_place",
-           [](platform::Place &self) { return platform::is_cpu_place(self); })
-      .def("is_gpu_place",
-           [](platform::Place &self) { return platform::is_gpu_place(self); })
-      .def("is_cuda_pinned_place",
-           [](platform::Place &self) {
-             return platform::is_cuda_pinned_place(self);
-           })
-      .def("gpu_device_id",
-           [](platform::Place &self) {
-             PADDLE_ENFORCE(platform::is_gpu_place(self),
-                            "gpu_device_id() only supports in CUDAPlace");
-             return boost::get<platform::CUDAPlace>(self).device;
-           })
       .def("set_place",
            [](platform::Place &self, const platform::CPUPlace &cpu_place) {
              self = cpu_place;

python/paddle/fluid/layers/nn.py

@@ -23,7 +23,7 @@ import os
 import inspect
 from ..layer_helper import LayerHelper
 from ..initializer import Normal, Constant
-from ..framework import Variable, OpProtoHolder, Program
+from ..framework import Variable, OpProtoHolder
 from ..param_attr import ParamAttr
 from .layer_function_generator import autodoc, templatedoc, _generate_doc_string_
 from .tensor import concat

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

@@ -59,7 +59,7 @@ def simple_fc_net(img, label, use_py_func_op):
             size=200,
             bias_attr=fluid.ParamAttr(
                 initializer=fluid.initializer.Constant(value=1.0)))
-        if use_py_func_op:
+        if not use_py_func_op:
             hidden = fluid.layers.tanh(hidden)
         else:
             new_hidden = fluid.default_main_program().current_block(