执行廖雪峰老师案例时出现的问题【pymysql.err.OperationalError: (2003, "Can't connect to MySQL server on '127.0.0.1'"】

跟着GitHub里面的内容码代码，在链接数据库那段实验代码时出现了如下的错误：python Traceback (most recent call last): File "D:\Python\lib\site-packages\aiomysql\connection.py", line 461, in _connect self.host_info = "socket %s:%d"

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