from sklearn.preprocessing import binarize
import pandas as pd

df = pd.read_csv('data.csv')
b = binarize(df, threshold=1)

print(df)
print(b)

df
   data
0     1
1     2
2     1
3     2
4     1
5     2

array([[0],
       [1],
       [0],
       [1],
       [0],
       [1]])