Rename method to _ipython_key_completions_

IPython/core/completer.py

@@ -937,8 +937,8 b' class IPCompleter(Completer):'
         def get_keys(obj):
             # Objects can define their own completions by defining an
             # _ipy_key_completions_() method.
-            if _safe_really_hasattr(obj, '_ipy_key_completions_'):
-                return obj._ipy_key_completions_()
+            if _safe_really_hasattr(obj, '_ipython_key_completions_'):
+                return obj._ipython_key_completions_()
 
             # Special case some common in-memory dict-like types
             if isinstance(obj, dict) or\

IPython/core/tests/test_completer.py

@@ -765,7 +765,7 b' class KeyCompletable(object):'
     def __init__(self, things=()):
         self.things = things
 
-    def _ipy_key_completions_(self):
+    def _ipython_key_completions_(self):
         return list(self.things)
 
 def test_object_key_completion():