用pythom、mypysql链接数据库链接不成功求大佬指点

import pymysql
db = pymysql.connect('localhost','root','mkfmkf','mrsoft')
cursor = db.cursor()
cursor.execute('SELECT VERSION')
date = cursor.fetchone()
print('Date:%s'%date)
db.close




Python 3.6.6 (v3.6.6:4cf1f54eb7, Jun 27 2018, 03:37:03) [MSC v.1900 64 bit (AMD64)] on win32
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>>> 
===================== RESTART: D:\Python\数据库练习\chage.py =====================
Traceback (most recent call last):
  File "D:\Python\数据库练习\chage.py", line 2, in <module>
    db = pymysql.connect('localhost','root','mkfmkf','mrsoft')
TypeError: __init__() takes 1 positional argument but 5 were given
>>>