python连接MySQL
# 下载第三方模块: pip3 install pymysql # 面条版 import pymysql # 连接mysql数据库的模块 # 1.连接数据库 client = pymysql.connect( host=‘127.0.0.1‘, port=3306, user=‘root‘, password=‘123456‘, database=‘db4‘, charset=‘utf8‘, # 此处不能写utf-8 autocommit=True ) # print(client) # 2.获取游标对象 ----> 游标 可以用来提交sql命令 # 将取回值以字典形式显示:pymysql.cursors.DictCursor cursor_obj = client.cursor(pymysql.cursors.DictCursor) # cursor_obj = client.cursor() # 以元组形式显示(1, ‘tank‘) # 3.通过execute 可以提交sql语句 # 1）查数据 # sql = ‘select * from emp‘ # # 提交sql语句 # cursor_obj.execute(sql) # # # 4.提交后，通过cursor_obj对象.fetchall() 获取所以查询到的结果 # res = cursor_obj.fetchall() # print(res) # # for dic in res: # print(dic) # 2）插入数据 # 创建表 # sql = ‘create table user(id int, name varchar(16))‘ # sql = ‘insert into user(id, name) values(1, "tank")‘ # 3) 更新数据 # try: # sql = ‘update user set name="tank_is_handsome" where id=1‘ # cursor_obj.execute(sql) # # except Exception as e: # print(e) # 4) 删除数据 # sql = ‘delete from user‘ # cursor_obj.execute(sql) # # # 关闭游标 # cursor_obj.close() # # # 关闭客户端连接 # client.close()