pymysql模块操作数据库及连接报错解决方法

import pymysql

sql = "select host,user,password from user" #想要执行的MySQL语句

#sql = 'create database sss character set utf8'

#打开数据库连接

db = pymysql.connect(host="192.168.254.40", user="root",

                     password="root", db="mysql", port=3306)

cur = db.cursor()#使用cursor()方法获取操作游标

cur.execute(sql)  # 执行sql语句

results = cur.fetchall()  # 获取查询的所有记录

for i in results:#遍历结果

    print(i)

db.close()  # 关闭连接

 pymysql：Mysql拒绝从远程访问的解决办法

报错内容

Traceback (most recent call last):

  File "E:/untitled1/lvs_rr.py", line 15, in <module>

    password="1", db="mysql", port=3306)

  File "E:\untitled1\lib\site-packages\pymysql\__init__.py", line 94, in Connect

    return Connection(*args, **kwargs)

  File "E:\untitled1\lib\site-packages\pymysql\connections.py", line 325, in __init__

    return Connection(*args, **kwargs)
  File "E:\untitled1\lib\site-packages\pymysql\connections.py", line 325, in __init__
    self.connect()
  File "E:\untitled1\lib\site-packages\pymysql\connections.py", line 599, in connect
    self._request_authentication()
  File "E:\untitled1\lib\site-packages\pymysql\connections.py", line 861, in _request_authentication
    auth_packet = self._read_packet()
  File "E:\untitled1\lib\site-packages\pymysql\connections.py", line 684, in _read_packet
    packet.check_error()
  File "E:\untitled1\lib\site-packages\pymysql\protocol.py", line 220, in check_error
    err.raise_mysql_exception(self._data)
  File "E:\untitled1\lib\site-packages\pymysql\err.py", line 109, in raise_mysql_exception
    raise errorclass(errno, errval)

 

解决方法：

添加用户允许从任何主机连接到mysql服务器 

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;

即时生效

FLUSH PRIVILEGES;