Python报错-(2003 Can t connect to MySQL server on 127.0.0.1)
2017-12-30 23:20
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报错修复:bpymysql.err.OperationalError: (2003, “Can’t connect to MySQL server on ‘127.0.0.1’”)
报错日志
原因就是连接不上 MySQL服务器
配置参数每次修改,都需要重新启动 mysql
计算机->管理->服务和应用程序->服务->mysql 右键,重新启动即可
具体如下
报错日志
D:\python3-webapp-Su\www>python app.py INFO:root:建立数据库连接池 Traceback (most recent call last): File "C:\ProgramData\Anaconda3\lib\site-packages\aiomysql\connection.py", line 476, in _connect yield from self._request_authentication() File "C:\ProgramData\Anaconda3\lib\site-packages\aiomysql\connection.py", line 702, in _request_authentication auth_packet = yield from self._read_packet() File "C:\ProgramData\Anaconda3\lib\site-packages\aiomysql\connection.py", line 567, in _read_packet packet.check_error() File "C:\ProgramData\Anaconda3\lib\site-packages\pymysql\connections.py", line 384, in check_error err.raise_mysql_exception(self._data) File "C:\ProgramData\Anaconda3\lib\site-packages\pymysql\err.py", line 107, in raise_mysql_exception raise errorclass(errno, errval) pymysql.err.InternalError: (1049, "Unknown database 'sufadi'") The above exception was the direct cause of the following exception: Traceback (most recent call last): File "app.py", line 79, in <module> loop.run_until_complete(init(loop)) File "C:\ProgramData\Anaconda3\lib\asyncio\base_events.py", line 467, in run_until_complete return future.result() File "app.py", line 63, in init yield from orm.create_pool(loop = loop, host = "127.0.0.1", port = 3306, user = "root", password = "", database = "sufadi") File "D:\python3-webapp-Su\www\orm.py", line 29, in create_pool loop = loop File "C:\ProgramData\Anaconda3\lib\site-packages\aiomysql\utils.py", line 70, in __iter__ resp = yield from self._coro File "C:\ProgramData\Anaconda3\lib\site-packages\aiomysql\pool.py", line 30, in _create_pool yield from pool._fill_free_pool(False) File "C:\ProgramData\Anaconda3\lib\site-packages\aiomysql\pool.py", line 173, in _fill_free_pool **self._conn_kwargs) File "C:\ProgramData\Anaconda3\lib\site-packages\aiomysql\utils.py", line 70, in __iter__ resp = yield from self._coro File "C:\ProgramData\Anaconda3\lib\site-packages\aiomysql\connection.py", line 78, in _connect yield from conn._connect() File "C:\ProgramData\Anaconda3\lib\site-packages\aiomysql\connection.py", line 496, in _connect self._host) from e pymysql.err.OperationalError: (2003, "Can't connect to MySQL server on '127.0.0.1'")
原因就是连接不上 MySQL服务器
检查 是否启动
先验证一下MySQL的服务是否开启,到计算机->管理->服务和应用程序->服务启动方法
右键启动 或者C:\WINDOWS\system32>net start mysql
查看客户端和服务端的服务器和端口是否一致
Mysql服务端的my.ini,端口是 3306
(安装路径的根目录D:\mysql-5.6.24-win32)# For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html # *** DO NOT EDIT THIS FILE. It's a template which will be copied to the # *** default location during install, and will be replaced if you # *** upgrade to a newer version of MySQL. [mysqld] # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M # Remove leading # to turn on a very important data integrity option: logging # changes to the binary log between backups. # log_bin # These are commonly set, remove the # and set as required. # basedir = ..... # datadir = ..... # port = ..... # server_id = ..... # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M [mysqld] bind-address = 127.0.0.1 #设置 3306 端口 port = 3306 # 设置mysql的安装目录 basedir=D:\mysql-5.6.24-win32 # 设置mysql数据库的数据的存放目录 datadir=D:\mysql-5.6.24-win32\data # 允许最大连接数 max_connections=200 # 服务端使用的字符集默认为8比特编码的latin1字符集 character-set-server=utf8 # 创建新表时将使用的默认存储引擎 default-storage-engine=INNODB sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES [mysql] # 设置mysql客户端默认字符集 default-character-set=utf8 #代码结束
配置参数每次修改,都需要重新启动 mysql
计算机->管理->服务和应用程序->服务->mysql 右键,重新启动即可
客户端的端口
yield from orm.create_pool(loop = loop, host = "127.0.0.1", port = 3306, user = "root", password = "", database = "test")
具体如下
@asyncio.coroutine def init(loop): yield from orm.create_pool(loop = loop, host = "127.0.0.1", port = 3306, user = "root", password = "", database = "test") #创建一个web服务器对象 app = web.Application(loop = loop) #通过router的指定的方法可以把请求的链接和对应的处理函数关联在一起 init_jinja2(app, filters=dict(datetime = datetime_filter)) add_routes(app, "handlers") add_static(app) #运行web服务器,服务器启动后,有用户在浏览器访问,就可以做出对应的响应 # 127.0.0.1 本机地址 srv = yield from loop.create_server(app.make_handler(), "127.0.0.1", 9000) logging.info("服务端 http://127.0.0.1:9000....") return srv # 固定写法 loop = asyncio.get_event_loop() loop.run_until_complete(init(loop)) loop.run_forever()
运行效果
D:\python3-webapp-Su\www>python app.py INFO:root:建立数据库连接池 INFO:root:初始化 jinja2 INFO:root:设置 jinja2 templates 地址为 D:\python3-webapp-Su\www\templates INFO:root:add_static /static/ -> D:\python3-webapp-Su\www\static INFO:root:服务端 http://127.0.0.1:9000....
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