#替换掉xiaozhang的值，修改为xiaoming

a=['xiaoxing','xiaoliu','xiaozhang','xiaohong','xiaoli','xiaozhao']
a[2]="xiaoming"
print(a)

输出结果：
['xiaoxing', 'xiaoliu', 'xiaoming', 'xiaohong', 'xiaoli', 'xiaozhao']

　　

#替换掉xiaozhang,xiaohong的值，修改为b,c

a=['xiaoxing','xiaoliu','xiaozhang','xiaohong','xiaoli','xiaozhao']
a[2:4]=["b","c"]
print(a)

输出结果：
['xiaoxing', 'xiaoliu', 'b', 'c', 'xiaoli', 'xiaozhao']