add data_pub messages

for publishing raw data, rather than reprs (zmq-only)

IPython/core/interactiveshell.py

@@ -270,6 +270,7 b' class InteractiveShell(SingletonConfigurable):'
     display_formatter = Instance(DisplayFormatter)
     displayhook_class = Type(DisplayHook)
     display_pub_class = Type(DisplayPublisher)
+    data_pub_class = None
 
     exit_now = CBool(False)
     exiter = Instance(ExitAutocall)
@@ -483,6 +484,7 b' class InteractiveShell(SingletonConfigurable):'
         self.init_prompts()
         self.init_display_formatter()
         self.init_display_pub()
+        self.init_data_pub()
         self.init_displayhook()
         self.init_reload_doctest()
         self.init_latextool()
@@ -659,6 +661,13 b' class InteractiveShell(SingletonConfigurable):'
         self.display_pub = self.display_pub_class(config=self.config)
         self.configurables.append(self.display_pub)
 
+    def init_data_pub(self):
+        if not self.data_pub_class:
+            self.data_pub = None
+            return
+        self.data_pub = self.data_pub_class(config=self.config)
+        self.configurables.append(self.data_pub)
+
     def init_displayhook(self):
         # Initialize displayhook, set in/out prompts and printing system
         self.displayhook = self.displayhook_class(

IPython/zmq/ipkernel.py

@@ -147,6 +147,8 b' class Kernel(Configurable):'
         self.shell.displayhook.topic = self._topic('pyout')
         self.shell.display_pub.session = self.session
         self.shell.display_pub.pub_socket = self.iopub_socket
+        self.shell.data_pub.session = self.session
+        self.shell.data_pub.pub_socket = self.iopub_socket
 
         # TMP - hack while developing
         self.shell._reply_content = None
@@ -353,6 +355,7 b' class Kernel(Configurable):'
         # Set the parent message of the display hook and out streams.
         shell.displayhook.set_parent(parent)
         shell.display_pub.set_parent(parent)
+        shell.data_pub.set_parent(parent)
         sys.stdout.set_parent(parent)
         sys.stderr.set_parent(parent)
 
@@ -538,6 +541,7 b' class Kernel(Configurable):'
         shell = self.shell
         shell.displayhook.set_parent(parent)
         shell.display_pub.set_parent(parent)
+        shell.data_pub.set_parent(parent)
         sys.stdout.set_parent(parent)
         sys.stderr.set_parent(parent)
 

IPython/zmq/zmqshell.py

@@ -44,6 +44,7 b' from IPython.utils import py3compat'
 from IPython.utils.traitlets import Instance, Type, Dict, CBool, CBytes
 from IPython.utils.warn import warn, error
 from IPython.zmq.displayhook import ZMQShellDisplayHook
+from IPython.zmq.datapub import ZMQDataPublisher
 from IPython.zmq.session import extract_header
 from session import Session
 
@@ -464,6 +465,7 b' class ZMQInteractiveShell(InteractiveShell):'
 
     displayhook_class = Type(ZMQShellDisplayHook)
     display_pub_class = Type(ZMQDisplayPublisher)
+    data_pub_class = Type(ZMQDataPublisher)
 
     # Override the traitlet in the parent class, because there's no point using
     # readline for the kernel. Can be removed when the readline code is moved