1.知道了一些图书的信息，找出其中最小的价格：

#!/usr/bin/pythonbooks=[        {
    "name":"abc","price":23.3,"store":u"xinhu"},        {
    "name":"win","price":12.3,"store":"kk"},        {
    "name":"kk","price":11,"store":"koko"},        {
    "name":"linux","price":0.3,"store":"yamx"},                                                                                                          ]res = min(item[x] for item in books for x in item if "price" == x)print res