code sample for pandas-dev#46900

Author: simonjayhawkins

bisect/46900.py

@@ -0,0 +1,16 @@
+# BUG: MultiIndex.dtypes index behavior changes after 1.4.x #46900
+
+import pandas as pd
+
+print(pd.__version__)
+
+arrays = [[1, 1, 2, 2], ["red", "blue", "red", "blue"]]
+pmidx = pd.MultiIndex.from_arrays(arrays, names=[("zero", "first"), ("one", "second")])
+
+result = pmidx.dtypes.index
+print(result)
+
+expected = pd.MultiIndex.from_tuples(
+    [("zero", "first"), ("one", "second")],
+)
+pd.testing.assert_index_equal(result, expected)