Pandas OR statement ending in series contains

use Pandas crosstab:

import numpy as np
import pandas as pd
df = pd.DataFrame(np.random.randint(0, 10, size=(100, 2)), columns=["type", "subtype"])
counts = pd.crosstab(df.type, df.subtype)

print counts.loc[0, [2, 3, 5, 6]].sum() + counts.loc[5, [3, 4, 7, 8]].sum()

the result is same as:

a = (((df.type == 0) & ((df.subtype == 2) | (df.subtype == 3) | 
         (df.subtype == 5) | (df.subtype == 6))) | 
         ((df.type == 5) & ((df.subtype == 3) | (df.subtype == 4) | (df.subtype == 7) | 
         (df.subtype ==  8))))
a.sum()