Error in Database connectivity with python3.7

[srm]

I am using mysql with python 3.7.2 to get connected my database.
on my windows 2008r2 ,I have installed first sql server 2012 and later also mysql.
I want to know what would be my mysql instance name as localhost would be sql server 2012 and when I am trying to connect it ,it gives me access denied error.code is as follows:-

import pymysql
conn=pymysql.connect('localhost','root@localhost','mcse@123','mysqldb')
if not conn!=None:
    print("Connection Succeeded")
    cmd=conn.cursor()
    cmd.execute('create table emp(empid int,empname char(10))')
    conn.close()
    cmd=conn.cursor()
    cmd.execute("insert into emp values(111,'asha')")
    conn.commit()
    conn.close()
    cmd.cursor()
    cmd.execute('select * from emp')
    result=cmd.fetchall()
    for i in result:
        print(i)
        conn.close()

Thanx in adavnce