昨天写的部分作业代码。（临时文件没价值，别看）

http://jingyan.baidu.com/article/8cdccae997854e315413cdff.html

msg = [
[1,"helei",23]
]
date = input(":>>") # select name form list where age > 22
a = date.split(" ")
tiaojian = a[1]
biao = a[2]

print(a)
if a[0]=="select":
print("查找")
for i in msg:
if a[2]:
if a[1] in i:
print(i)
else:break

elif a[0]=="install":
print("新增")

elif a[0]=="delete":
print("删除")

elif a[0]=="update":
print("更新")