BUG: Solve 2to3 conversion error.

One of the methods in the inprocess kernel objects used
a local variable called `raw_input` that was mistakenly
converted to `input` during the 2to3 conversion.

IPython/inprocess/blockingkernelmanager.py

@@ -74,10 +74,10 b' class BlockingStdInInProcessChannel(BlockingChannelMixin, StdInInProcessChannel)'
         """
         msg_type = msg['header']['msg_type']
         if msg_type == 'input_request':
-            raw_input = self.manager.kernel.sys_raw_input
+            _raw_input = self.manager.kernel._sys_raw_input
             prompt = msg['content']['prompt']
             raw_print(prompt, end='')
-            self.input(raw_input())
+            self.input(_raw_input())
 
 class BlockingInProcessKernelManager(InProcessKernelManager):
 

IPython/zmq/ipkernel.py

@@ -84,7 +84,6 b' class Kernel(Configurable):'
     control_stream = Instance(ZMQStream)
     iopub_socket = Instance(zmq.Socket)
     stdin_socket = Instance(zmq.Socket)
-    sys_raw_input = Any()
     log = Instance(logging.Logger)
     
     user_module = Any()
@@ -132,7 +131,11 b' class Kernel(Configurable):'
     # This is a dict of port number that the kernel is listening on. It is set
     # by record_ports and used by connect_request.
     _recorded_ports = Dict()
-    
+
+    # A reference to the Python builtin 'raw_input' function.
+    # (i.e., __builtin__.raw_input for Python 2.7, builtins.input for Python 3)
+    _sys_raw_input = Any()
+
     # set of aborted msg_ids
     aborted = Set()
 
@@ -353,10 +356,10 b' class Kernel(Configurable):'
             raw_input = lambda prompt='' : self._no_raw_input()
 
         if py3compat.PY3:
-            self.sys_raw_input = __builtin__.input
+            self._sys_raw_input = __builtin__.input
             __builtin__.input = raw_input
         else:
-            self.sys_raw_input = __builtin__.raw_input
+            self._sys_raw_input = __builtin__.raw_input
             __builtin__.raw_input = raw_input
 
         # Set the parent message of the display hook and out streams.
@@ -391,9 +394,9 b' class Kernel(Configurable):'
         finally:
             # Restore raw_input.
              if py3compat.PY3:
-                 __builtin__.input = self.sys_raw_input
+                 __builtin__.input = self._sys_raw_input
              else:
-                 __builtin__.raw_input = self.sys_raw_input
+                 __builtin__.raw_input = self._sys_raw_input
 
         reply_content[u'status'] = status