pandas nan except diagnal code example

Example: How to replace both the diagonals of dataframe with 0 in pandas

import pandas as pd 
import numpy as np

df = pd.DataFrame(np.random.randint(1,100, 100).reshape(10, -1))

out = df.where(df.values != np.diag(df),0,df.where(df.values != np.flipud(df).diagonal(0),0,inplace=True))