name VARCHAR(20))")#继续执行一条SQL语句，插入一条记录:cursor.execute(r"INSERT INTO users(name)VALUES('Tom')")#执行查询语句，推荐用？占位:cursor.execute("SELECT*FROM users WHERE id=?(3,))#获得查询结果集:#结果集是一个list...
coding:utf-8-*-#要统计的词 words=["腾讯","百度","阿里...0)for word in words:counter2[word]+1 print(counter2)#defaultdict(<function <lambda>at 0x102261e18>,#{'腾讯':1,'百度':2,'阿里巴巴':2})参考：python中defaultdict方法的使用
1散列值以下是python官方提供的参考示例>>>import uuid>>>#make a UUID based on the host ID and current time>>>uuid.uuid1()UUID('a8098c1a-f86e-11da-bd1a-00112444be1e')>>>#make a UUID using an MD5 hash of a namespace UUID and a...
