Python3实现连接SQLite数据库的方法

import sqlite3db = 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staffcur.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()