Python script for taking mysqldump

dbbackup.py

#!/usr/local/bin/python3

"""
Will backup all the databases listed, will put files in same DIR as script'
To run: $ python dbbackup.py OR python3 dbbackup.py
"""

import configparser
import os
import time
import getpass

HOST='localhost'
PORT='3306'
DB_USER='username'
DB_PASS='password'
# if using one database... ('database1',)
databases=('database1','database2','database3')

def get_dump(database):
    filestamp = time.strftime('%Y-%m-%d-%I')
    # D:/xampp/mysql/bin/mysqldump for xamp windows
    os.popen("mysqldump -h %s -P %s -u %s -p%s %s > %s.sql" % (HOST,PORT,DB_USER,DB_PASS,database,database+"_"+filestamp))
    
    print("\n|| Database dumped to "+database+"_"+filestamp+".sql || ")


if __name__=="__main__":
    for database in databases:
        get_dump(database)

I'm having an empty file of 0kb when I run on the Windows task scheduler, but when run on cmd it backups the database with content in file