Python 连接数据库失败

报错如下：

Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pymysql/connections.py", line 582, in connect
**kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/socket.py", line 727, in create_connection
raise err
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/socket.py", line 716, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "mysql_conn.py", line 6, in <module>
db = pymysql.connect("localhost","root","201995zjh","ryan" )
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pymysql/__init__.py", line 94, in Connect
return Connection(*args, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pymysql/connections.py", line 327, in __init__
self.connect()
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pymysql/connections.py", line 629, in connect
raise exc
pymysql.err.OperationalError: (2003, "Can‘t connect to MySQL server on ‘localhost‘ ([Errno 61] Connection refused)")

在确定安装了 PyMySQL 以及数据库账号密码等没有问题时，还是不能连接 MySQL，

最后只剩下两种可能：

1. 运行 mysqladmin variables | grep socket 来获取套接字所在的位置，并尝试设置如下连接：

pymysql.connect(db=‘base‘, user=‘root‘, passwd=‘pwd‘, unix_socket="/tmp/mysql.sock")

2. 运行 mysqladmin variables | grep port 并验证端口是3306.如果没有，您可以手动设置端口，如下所示：

pymysql.connect(db=‘base‘, user=‘root‘, passwd=‘pwd‘, host=‘localhost‘, port=XXXX)

https://stackoverflow.com/questions/6885164/pymysql-cant-connect-to-mysql-on-localhost

Python 连接数据库失败

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