Enhance py_func error info message. (#26557)

cmake/inference_lib.cmake

@@ -110,10 +110,12 @@ function(copy_part_of_thrid_party TARGET DST)
             SRCS ${GLOG_INCLUDE_DIR} ${GLOG_LIBRARIES}
             DSTS ${dst_dir} ${dst_dir}/lib)
 
+    if (WITH_CRYPTO)
         set(dst_dir "${DST}/third_party/install/cryptopp")
         copy(${TARGET}
-        SRCS ${CRYPTOPP_INCLUDE_DIR} ${CRYPTOPP_LIBRARIES}
-        DSTS ${dst_dir} ${dst_dir}/lib)
+            SRCS ${CRYPTOPP_INCLUDE_DIR} ${CRYPTOPP_LIBRARIES}
+            DSTS ${dst_dir} ${dst_dir}/lib)
+    endif()
 
     set(dst_dir "${DST}/third_party/install/xxhash")
     copy(${TARGET}

paddle/fluid/operators/py_func_op.cc

@@ -111,7 +111,8 @@ static void CallPythonFunc(py::object *callable,
       out->set_lod(py_out_tensor->lod());
       out->ShareDataWith(*py_out_tensor);
     } catch (py::cast_error &) {
-      PADDLE_THROW("The %d-th output must be LoDTensor", i);
+      PADDLE_THROW(platform::errors::InvalidArgument(
+          "The %d-th output must be LoDTensor.", i));
     }
   }
 }