Why does the TypeError occur when __init__() expects 1 argument but receives 5?

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以下为简化后的代码内容：使用pymysql连接数据库，配置信息如下：dbhost='localhost'dbuser='root'dbpass='123456'dbname='mrsoft'db=pymysql.connect(host=dbhost, user=dbuser, password=dbpass, database=dbname)

以下为解决方案：

dbhost='localhost'
dbuser='root'
dbpass='123456'
dbname='mrsoft'

db=pymysql.connect(host=dbhost,user=dbuser,password=dbpass,database=dbname)