PyQt5:QMYSQL driver not loaded

[RamrajCh]

Hi,
I got a problem on connecting database on my project.
I use PyQt5.QSqlDatabase for connecting but a error occured.

from PyQt5.QtSql import *
 
class Database():
    def __init__(self,hostname,user,dbase,pword=""):
        self.db=QSqlDatabase.addDatabase("QMYSQL")
        self.db.setHostName(hostname)
        self.db.setDatabaseName(dbase)
        self.db.setUserName(user)
        self.db.setPassword(pword)
        ok = self.db.open()
 
mydb=Database("localhost","root","billingsys")

from PyQt5.QtSql import *

class Database():
    def __init__(self,hostname,user,dbase,pword=""):
        self.db=QSqlDatabase.addDatabase("QMYSQL")
        self.db.setHostName(hostname)
        self.db.setDatabaseName(dbase)
        self.db.setUserName(user)
        self.db.setPassword(pword)
        ok = self.db.open()

mydb=Database("localhost","root","billingsys")

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Error is:
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QODBC QODBC3 QPSQL QPSQL7