python mysql connect时候一直显示"Unknown MySQL server host
请问
conn = MySQLdb.connect(host='localhost', port=3306, user='root', passwd='12123', db='mydatabase')
-----这里可以连但是
如果把括号里面的这一串提取成一个的单独的变量,就不行了
str_con ='host=localhost, port=3306, user=root, passwd=12123, db=mydatabase'
MySQLdb.connect(str_con )
显示Unknown MySQL server host