向pandas dataframe添加按zscore分组的列

import pandas as pd
from scipy.stats import zscore

data = {'A': [1, 2, 3, 4, 5],
        'B': [6, 7, 8, 9, 10],
        'C': [11, 12, 13, 14, 15]}
df = pd.DataFrame(data)

df_zscore = df.apply(zscore)

df['ZScore_A'] = df_zscore['A']
df['ZScore_B'] = df_zscore['B']
df['ZScore_C'] = df_zscore['C']