Bug fix - cannot construct Index of empty tuples

pandas/core/indexes/base.py

@@ -531,7 +531,6 @@ def __new__(
         elif hasattr(data, "__array__"):
             return Index(np.asarray(data), dtype=dtype, copy=copy, name=name, **kwargs)
         else:
-
             if tupleize_cols and is_list_like(data):
                 # GH21470: convert iterable to list before determining if empty
                 if is_iterator(data):
@@ -542,9 +541,10 @@ def __new__(
                     # 10697
                     from pandas.core.indexes.multi import MultiIndex
 
-                    return MultiIndex.from_tuples(
-                        data, names=name or kwargs.get("names")
-                    )
+                    if all(data):
+                        return MultiIndex.from_tuples(
+                            data, names=name or kwargs.get("names")
+                        )
             # other iterable of some kind
 
             subarr = com.asarray_tuplesafe(data, dtype=_dtype_obj)

pandas/tests/indexes/base_class/test_constructors.py

@@ -40,3 +40,13 @@ def test_constructor_cast(self):
         msg = "could not convert string to float"
         with pytest.raises(ValueError, match=msg):
             Index(["a", "b", "c"], dtype=float)
+
+    def test_construct_empty_tuples(self):
+        # GH #45608
+        result = Index([()])
+        expected = Index([()], dtype="object")
+        tm.assert_index_equal(result, expected)
+
+        result = Index([(), None])
+        expected = Index([(), None], dtype="object")
+        tm.assert_index_equal(result, expected)