allow to use name_scope for debugging and visiualization

paddle/fluid/API.spec

@@ -36,6 +36,7 @@ paddle.fluid.default_startup_program ArgSpec(args=[], varargs=None, keywords=Non
 paddle.fluid.default_main_program ArgSpec(args=[], varargs=None, keywords=None, defaults=None)
 paddle.fluid.program_guard ArgSpec(args=[], varargs='args', keywords='kwds', defaults=None)
 paddle.fluid.get_var ArgSpec(args=['name', 'program'], varargs=None, keywords=None, defaults=(None,))
+paddle.fluid.name_scope ArgSpec(args=[], varargs='args', keywords='kwds', defaults=None)
 paddle.fluid.Executor.__init__ ArgSpec(args=['self', 'place'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.Executor.close ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.Executor.run ArgSpec(args=['self', 'program', 'feed', 'fetch_list', 'feed_var_name', 'fetch_var_name', 'scope', 'return_numpy', 'use_program_cache'], varargs=None, keywords=None, defaults=(None, None, None, 'feed', 'fetch', None, True, False))

paddle/fluid/framework/ir/graph_viz_pass.cc

@@ -17,12 +17,26 @@ limitations under the License. */
 
 #include "paddle/fluid/framework/ir/graph_viz_pass.h"
 #include "paddle/fluid/inference/analysis/dot.h"
+#include "paddle/fluid/framework/op_proto_maker.h"
+#include "paddle/fluid/string/printf.h"
 
 namespace paddle {
 namespace framework {
 namespace ir {
-static const char kGraphVizPath[] = "graph_viz_path";
 using inference::analysis::Dot;
+namespace {
+const char kGraphVizPath[] = "graph_viz_path";
+
+std::string FormatName(const Node* op) {
+  if (!op->Op() ||
+      !op->Op()->HasAttr(OpProtoAndCheckerMaker::OpNamescopeAttrName())) {
+    return op->Name();
+  }
+  const std::string full_scope = boost::get<std::string>(
+      op->Op()->GetAttr(OpProtoAndCheckerMaker::OpNamescopeAttrName()));
+  return string::Sprintf("%s%s", full_scope.c_str(), op->Name().c_str());
+}
+}  // namespace
 
 std::unique_ptr<ir::Graph> GraphVizPass::ApplyImpl(
     std::unique_ptr<ir::Graph> graph) const {
@@ -54,7 +68,7 @@ std::unique_ptr<ir::Graph> GraphVizPass::ApplyImpl(
   auto marked_nodes = ConsumeMarkedNodes(graph.get());
   // Create nodes
   for (const Node* n : graph->Nodes()) {
-    std::string node_id = n->Name() + "(" + std::to_string(n->id()) + ")";
+    std::string node_id = FormatName(n) + "(" + std::to_string(n->id()) + ")";
     if (n->IsOp()) {
       decltype(op_attrs) attr =
           marked_nodes.count(n) ? marked_op_attrs : op_attrs;

paddle/fluid/framework/ir/node.h

@@ -59,7 +59,7 @@ class Node {
     return var_desc_.get();
   }
 
-  OpDesc* Op() {
+  OpDesc* Op() const {
     PADDLE_ENFORCE(IsOp());
     return op_desc_.get();
   }

paddle/fluid/framework/op_proto_maker.cc

@@ -129,6 +129,9 @@ void OpProtoAndCheckerMaker::operator()(proto::OpProto* proto,
                                     "Optimized for variable")
       .SetDefault({});
 
+  AddAttr<std::string>(OpNamescopeAttrName(), "Operator name with namesope.")
+      .SetDefault("");
+
   Validate();
 }
 

paddle/fluid/framework/op_proto_maker.h

@@ -39,6 +39,7 @@ class OpProtoAndCheckerMaker {
  public:
   static const char *OpRoleAttrName() { return "op_role"; }
   static const char *OpRoleVarAttrName() { return "op_role_var"; }
+  static const char *OpNamescopeAttrName() { return "op_namescope"; }
 
   void operator()(proto::OpProto *proto, OpAttrChecker *attr_checker);
 

paddle/fluid/pybind/const_value.cc

@@ -43,6 +43,9 @@ void BindConstValue(pybind11::module* m) {
   op_proto_and_checker_maker.def(
       "kOpRoleVarAttrName",
       framework::OpProtoAndCheckerMaker::OpRoleVarAttrName);
+  op_proto_and_checker_maker.def(
+      "kOpNameScopeAttrName",
+      framework::OpProtoAndCheckerMaker::OpNamescopeAttrName);
 }
 
 }  // namespace pybind

python/paddle/fluid/framework.py

@@ -43,6 +43,7 @@ __all__ = [
     'default_main_program',
     'program_guard',
     'get_var',
+    'name_scope',
 ]
 
 EMPTY_VAR_NAME = core.kEmptyVarName()
@@ -52,6 +53,70 @@ ZERO_VAR_SUFFIX = core.kZeroVarSuffix()
 CONTROL_DEP_VAR_PREFIX = core.kControlDepVarName()
 
 
+class NameScope(object):
+    def __init__(self, name="", parent=None):
+        self._children = dict()
+        self._name = name
+        self._parent = parent
+
+    def child(self, prefix):
+        if prefix not in self._children:
+            new_child = NameScope(prefix, self)
+            self._children[prefix] = [new_child]
+        else:
+            new_child = NameScope(prefix + "_%d" % len(self._children[prefix]),
+                                  self)
+            self._children[prefix].append(new_child)
+        return new_child
+
+    def parent(self):
+        return self._parent
+
+    def name(self):
+        return self._name
+
+
+_name_scope = NameScope()
+
+
+@contextlib.contextmanager
+def name_scope(prefix=None):
+    """
+    Generate hierarchical name prefix for the operators.
+
+    Note: This should only used for debugging and visualization purpose.
+    Don't use it for serious analysis such as graph/program transformations.
+
+    Args:
+        prefix(str): prefix.
+
+    Examples:
+        .. code-block:: python
+          with name_scope("encoder"):
+             ...
+          with name_scope("decoder"):
+             ...
+             with name_scope("attention"):
+                ...
+    """
+    # TODO(panyx0718): Only [0-9a-z].
+    assert prefix, "namescope prefix cannot be empty."
+    global _name_scope
+    _name_scope = _name_scope.child(prefix)
+    yield
+    _name_scope = _name_scope.parent()
+
+
+def _full_name_scope():
+    global _name_scope
+    scope = _name_scope
+    name = ""
+    while scope:
+        name = scope.name() + "/" + name
+        scope = scope.parent()
+    return name
+
+
 def generate_control_dev_var_name():
     import random
     return CONTROL_DEP_VAR_PREFIX + "@" + str(random.random())
@@ -515,6 +580,9 @@ class Operator(object):
         self.desc.set_type(type)
         proto = OpProtoHolder.instance().get_op_proto(type)
 
+        namescope_var_name = op_maker.kOpNameScopeAttrName()
+        op_attrs[namescope_var_name] = _full_name_scope()
+
         def find_name(var_list, name):
             for var_name in var_list:
                 if var_list[var_name] is not None and var_name == name:

python/paddle/fluid/optimizer.py

@@ -15,7 +15,7 @@
 from __future__ import print_function
 import re
 from collections import defaultdict
-from paddle.fluid.framework import Program, Variable
+from paddle.fluid.framework import Program, Variable, name_scope
 from . import framework
 from . import layers
 from .backward import append_backward
@@ -237,7 +237,7 @@ class Optimizer(object):
                 if param_and_grad[1] is None:
                     continue
                 with param_and_grad[0].block.program.optimized_guard(
-                        param_and_grad):
+                        param_and_grad), name_scope("optimizer"):
                     if param_and_grad[0].trainable is True:
                         optimize_op = self._append_optimize_op(loss.block,
                                                                param_and_grad)

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

+#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import print_function
+
+import unittest
+import paddle.fluid as fluid
+
+
+class TestNameScope(unittest.TestCase):
+    def test_name_scope(self):
+        with fluid.name_scope("s1"):
+            a = fluid.layers.data(name='data', shape=[1], dtype='int32')
+            b = a + 1
+            with fluid.name_scope("s2"):
+                c = b * 1
+            with fluid.name_scope("s3"):
+                d = c / 1
+        with fluid.name_scope("s1"):
+            f = fluid.layers.pow(d, 2.0)
+        with fluid.name_scope("s4"):
+            g = f - 1
+
+        for op in fluid.default_main_program().block(0).ops:
+            if op.type == 'elementwise_add':
+                self.assertEqual(op.desc.attr("op_namescope"), '/s1/')
+            elif op.type == 'elementwise_mul':
+                self.assertEqual(op.desc.attr("op_namescope"), '/s1/s2/')
+            elif op.type == 'elementwise_div':
+                self.assertEqual(op.desc.attr("op_namescope"), '/s1/s3/')
+            elif op.type == 'elementwise_sub':
+                self.assertEqual(op.desc.attr("op_namescope"), '/s4/')
+            elif op.type == 'pow':
+                self.assertEqual(op.desc.attr("op_namescope"), '/s1_1/')

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

@@ -67,6 +67,7 @@ def fc_with_batchnorm(use_feed):
 
     hidden = img
     for _ in range(1):
+        with fluid.name_scope("hidden"):
             hidden = fluid.layers.fc(
                 hidden,
                 size=200,
@@ -75,8 +76,9 @@ def fc_with_batchnorm(use_feed):
                     initializer=fluid.initializer.Constant(value=1.0)))
 
             hidden = fluid.layers.batch_norm(input=hidden)
-
+    with fluid.name_scope("fc_layer"):
         prediction = fluid.layers.fc(hidden, size=10, act='softmax')
+    with fluid.name_scope("loss"):
         loss = fluid.layers.cross_entropy(input=prediction, label=label)
         loss = fluid.layers.mean(loss)
     return loss