pandas 的loc布尔索引

import pandas as pd
import numpy as np 

boolean=[True,False]
gender=[‘男‘,‘女‘]
color=[‘green‘,‘blue‘,‘yellow‘]
data=pd.DataFrame({‘height‘:np.random.randint(150,190,100),
                   ‘weight‘:np.random.randint(40,90,100),
                   ‘smoker‘:[boolean[x] for x in np.random.randint(0,2,100)],
                   ‘gender‘:[gender[x] for x in np.random.randint(0,2,100)],
                   ‘age‘:np.random.randint(15,90,100),
                   ‘color‘:[color[x] for x in np.random.randint(0,len(color),100)]})
data.loc[data[‘gender‘]==‘男‘,‘xingbie‘]=1 #里面的xingbie 的列原来并没有存在