摘要： 1. 切换数据库 显示当前数据库 db 切换数据库 use examples 2. 插入文档 MongoDB stores documents in collections. Collections are analogous to tables in relational databases. I 阅读全文

摘要： 代码：#! /usr/bin/env python#coding=utf-8import random,copydef heap_sort_helper(lst,left,right): # max heapify current_value = lst[left] child =... 阅读全文