python3 连接sqlite实例，直接上代码吧

import sqlite3  db = r"D:\pyWork\test.db"    #pyWork目录下test.db数据库文件  drp_tb_sql = "drop table if exists staff"  crt_tb_sql = """  create table if not exists staff(      id integer primary key autoincrement unique not null,      name varchar(100),      city varchar(100)  );  """  #连接数据库  con = sqlite3.connect(db)  cur = con.cursor()  #创建表staff  cur.execute(drp_tb_sql)  cur.execute(crt_tb_sql)  #插入记录  insert_sql = "insert into staff (name,city) values (?,?)"    #?为占位符  cur.execute(insert_sql,('Tom','New York'))  cur.execute(insert_sql,('Frank','Los Angeles'))  cur.execute(insert_sql,('Kate','Chicago'))  cur.execute(insert_sql,('Thomas','Houston'))  cur.execute(insert_sql,('Sam','Philadelphia'))  con.commit()  #查询记录  select_sql = "select * from staff"  cur.execute(select_sql)  #返回一个list，list中的对象类型为tuple（元组）  date_set = cur.fetchall()  for row in date_set:      print(row)  cur.close()  con.close()