Make print_op able to show the value of bool tensor

And some minor fixes on comments.

paddle/fluid/operators/elementwise_op_function.h

@@ -314,7 +314,6 @@ EIGEN_FUNCTOR(Div, EIGEN_DIV);
 template <typename DeviceContext, typename T, typename functor,
           typename broadcastfunctor, typename broadcast2functor>
 void ElementwiseGradCompute(const framework::ExecutionContext& ctx,
-
                             const framework::Tensor* x,
                             const framework::Tensor* y,
                             const framework::Tensor* out,

paddle/fluid/operators/print_op.cc

@@ -46,7 +46,7 @@ struct Formater {
   }
 
  private:
-  void PrintMessage() { CLOG << std::time(nullptr) << "\t" << message; }
+  void PrintMessage() { CLOG << std::time(nullptr) << "\t" << message << "\t"; }
   void PrintName() {
     if (!name.empty()) {
       CLOG << "Tensor[" << name << "]" << std::endl;
@@ -85,15 +85,16 @@ struct Formater {
     // print float
     if (dtype.hash_code() == typeid(float).hash_code()) {
       Display<float>(size);
-    }
-    if (dtype.hash_code() == typeid(double).hash_code()) {
+    } else if (dtype.hash_code() == typeid(double).hash_code()) {
       Display<double>(size);
-    }
-    if (dtype.hash_code() == typeid(int).hash_code()) {
+    } else if (dtype.hash_code() == typeid(int).hash_code()) {
       Display<int>(size);
-    }
-    if (dtype.hash_code() == typeid(int64_t).hash_code()) {
+    } else if (dtype.hash_code() == typeid(int64_t).hash_code()) {
       Display<int64_t>(size);
+    } else if (dtype.hash_code() == typeid(bool).hash_code()) {
+      Display<bool>(size);
+    } else {
+      CLOG << "\tdata: unprintable type: " << dtype.name() << std::endl;
     }
   }
 
@@ -182,6 +183,7 @@ class TensorPrintOp : public framework::OperatorBase {
     }
 
     Formater formater;
+    formater.message = Attr<std::string>("message");
     if (Attr<bool>("print_tensor_name")) {
       formater.name = printed_var_name;
     }

python/paddle/v2/fluid/layers/control_flow.py

@@ -174,7 +174,7 @@ def Print(input,
         print_tensor_type (bool): Print the tensor type.
         print_tensor_shape (bool): Print the tensor shape.
         print_tensor_lod (bool): Print the tensor lod.
-        print_phase (bool): Which phase to displace, including 'forward',
+        print_phase (str): Which phase to displace, including 'forward',
                 'backward' and 'both'. If set to 'backward' or 'both', will
                 print the gradients of input tensor.
 

python/paddle/v2/fluid/layers/nn.py

@@ -2070,7 +2070,7 @@ def reduce_sum(input, dim=None, keep_dim=False, name=None):
             Tensor variable with a single element, otherwise must be in the
             range :math:`[-rank(input), rank(input))`. If :math:`dim < 0`,
             the dimension to reduce is :math:`rank + dim`.
-        keep_dim (bool): Whether to reserve the reduced dimension in the
+        keep_dim (bool|False): Whether to reserve the reduced dimension in the
             output Tensor. The result tensor will have one fewer dimension
             than the :attr:`input` unless :attr:`keep_dim` is true.
         name(str|None): A name for this layer(optional). If set None, the layer