code sample for pandas-dev#39434

Author: simonjayhawkins

bisect/39434.py

@@ -0,0 +1,10 @@
+import numpy as np
+import pandas as pd
+
+print(pd.__version__)
+
+df = pd.DataFrame(np.arange(64))
+length = len(df.index)
+df.index = [(i - length / 2) % length for i in range(length)]
+result = df.sort_index(axis=0, ascending=None, na_position="first")
+print(result)