以下程序实现：把'xiaoming'的个人信息填到family的csv文件中，再读取出来。空格处应填？（　）

import json 

import csv 

fam = {'name':'xiaoming','age':18,'gender':'nan'} 

with open('family.csv','w') as f: 

    json.______(fam,f) 

with open('family.csv','r') as f1: 

    read1 = json.______(f1) 

    print(read1)