Index: Objects/fileobject.c
===================================================================
--- Objects/fileobject.c	(revision 61635)
+++ Objects/fileobject.c	(working copy)
@@ -2073,6 +2073,30 @@
 "'U' cannot be combined with 'w' or '+' mode.\n"
 );
 
+PyObject *
+PyFile_GetAttr(PyObject *obj, PyObject *name)
+{
+	if (Py_Py3kWarningFlag &&
+	    strcmp(PyString_AsString(name), "softspace") == 0 &&
+	    PyErr_WarnEx(PyExc_DeprecationWarning,
+		    	 "file.softspace was removed in 3.x", 1) < 0)
+		return NULL;
+	else
+		return PyObject_GenericGetAttr(obj, name);
+}
+
+int
+PyFile_SetAttr(PyObject *obj, PyObject *name, PyObject *value)
+{
+	if (Py_Py3kWarningFlag &&
+	    strcmp(PyString_AsString(name), "softspace") == 0 &&
+	    PyErr_WarnEx(PyExc_DeprecationWarning,
+		    	 "file.softspace was removed in 3.x", 1) < 0)
+		return -1;
+	else
+		return PyObject_GenericSetAttr(obj, name, value);
+}
+
 PyTypeObject PyFile_Type = {
 	PyVarObject_HEAD_INIT(&PyType_Type, 0)
 	"file",
@@ -2090,9 +2114,9 @@
 	0,					/* tp_hash */
 	0,					/* tp_call */
 	0,					/* tp_str */
-	PyObject_GenericGetAttr,		/* tp_getattro */
+	PyFile_GetAttr,				/* tp_getattro */
 	/* softspace is writable:  we must supply tp_setattro */
-	PyObject_GenericSetAttr,		/* tp_setattro */
+	PyFile_SetAttr,				/* tp_setattro */
 	0,					/* tp_as_buffer */
 	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_WEAKREFS, /* tp_flags */
 	file_doc,				/* tp_doc */
Index: Misc/NEWS
===================================================================
--- Misc/NEWS	(revision 61635)
+++ Misc/NEWS	(working copy)
@@ -12,6 +12,8 @@
 Core and builtins
 -----------------
 
+- Issue #2348: Raise a Py3k warning on file.softspace.
+
 - Issue #2400: Allow relative imports to "import *".
 
 - Issue 1745.  Backport print function with:
Index: Lib/test/test_py3kwarn.py
===================================================================
--- Lib/test/test_py3kwarn.py	(revision 61635)
+++ Lib/test/test_py3kwarn.py	(working copy)
@@ -1,7 +1,8 @@
 import unittest
 import sys
+import os
 from test.test_support import (catch_warning, TestSkipped, run_unittest,
-                                TestSkipped)
+                                TESTFN)
 import warnings
 
 if not sys.py3kwarning:
@@ -94,6 +95,21 @@
         with catch_warning() as w:
             self.assertWarning(sorted(lst, cmp), w, expected)
 
+    def test_file_softspace(self):
+        expected = "file.softspace was removed in 3.x"
+        f = open(TESTFN, 'w')
+        def setter():
+            f.softspace = 42
+
+        try:
+            with catch_warning() as w:
+                self.assertWarning(f.softspace, w, expected)
+            with catch_warning() as w:
+                self.assertWarning(setter(), w, expected)
+        finally:
+            f.close()
+            os.remove(TESTFN)
+
 def test_main():
     run_unittest(TestPy3KWarnings)