add code sample for pandas-dev#37465

Author: simonjayhawkins

bisect/37465.py

@@ -0,0 +1,10 @@
+import pandas as pd
+import numpy as np
+
+print(pd.__version__)
+
+g = np.random.default_rng(840812492384587325982704)
+a = pd.Series(g.integers(0, 3, size=100)).astype("category")
+b = pd.Series(g.integers(0, 2, size=100)).astype("category")
+res = pd.crosstab(a, b, margins=True, dropna=False)
+print(res)