import gzip
import os
import delegator
import datetime

date = datetime.datetime.now().strftime("%d-%B-%Y-%H-%M")
path = os.path.join(os.path.expanduser('~'), 'Yandex.Disk', 'backups', 'example.com', 'database', 'example-backup-'+date+'.gz')

with gzip.open(path, 'wb') as f:
    c = delegator.run('pg_dump -U example_user -h localhost example_base')
    f.write(c.out.encode('utf-8'))