Isolate the exact array shape when issue occurs

summonholmes · summonholmes · commit cde96f8db91f · 2019-01-11T23:33:53.000-05:00
diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
@@ -5282,7 +5282,7 @@ def ensure_index(index_like, copy=False):
         if len(converted) > 0 and all_arrays:
             from .multi import MultiIndex
             return MultiIndex.from_arrays(converted)
-        elif converted.size > 2:
+        elif converted.shape == (1, 2, 2):
             # When nested tuples are incorrectly converted
             # to > 2 dimensions (Extremely rare)
             index_like = np.ndarray((1, 2), dtype=tuple)
