Index: Python/import.c
===================================================================
--- Python/import.c	(revision 78292)
+++ Python/import.c	(working copy)
@@ -2130,7 +2130,14 @@
 	if (parent == NULL)
 		return NULL;
 
-	head = load_next(parent, Py_None, &name, buf, &buflen);
+	/* If level is '-1', then we will allow relative or absolute
+	   imports.  Setting the alternative module to 'Py_None' causes
+	   the module name lookup to be resolved using an absolute lookup if
+	   a relative lookup in the parent module fails.  Otherwise, we
+	   only want absolute lookups to be peformed, thus we set the
+	   alternative module equal to the parent module. */
+	head = load_next(parent, level == -1 ? Py_None : parent, 
+			 &name, buf, &buflen);
 	if (head == NULL)
 		return NULL;
 
Index: Lib/test/badrelimport.py
===================================================================
--- Lib/test/badrelimport.py	(revision 0)
+++ Lib/test/badrelimport.py	(revision 0)
@@ -0,0 +1,2 @@
+# As seen in issue 7902 ...
+from .os import walk
Index: Lib/test/test_import.py
===================================================================
--- Lib/test/test_import.py	(revision 78292)
+++ Lib/test/test_import.py	(working copy)
@@ -418,6 +418,15 @@
         from . import relimport
         self.assertTrue(hasattr(relimport, "RelativeImport"))
 
+    def test_relimport_bad(self):
+        try:
+            from . import badrelimport
+        except ImportError, err:
+            self.assertEqual("No module named os",
+                              err.args[0])
+        else:
+            self.fail("bad relative import didn't raise an exception")
+
     def test_issue3221(self):
         def check_absolute():
             exec "from os import path" in ns