code sample for pandas-dev#37711

Author: simonjayhawkins

bisect/37711.py

@@ -0,0 +1,24 @@
+import pandas as pd
+
+print(pd.__version__)
+
+s = pd.Series(
+    [1, 2, 3], index=pd.MultiIndex.from_tuples([("a", "A"), ("b", "B"), ("c", "C")])
+)
+df = s.to_frame()
+print(
+    s.loc[
+        ("a",),
+    ]
+)
+print(
+    df.loc[
+        ("a",),
+    ]
+)
+
+df.loc[
+    ("a",),
+] = 0
+
+print(df)