examples using progress bar

progress_bar.py

```python

from ec.broker.user_persona import update_user_persona
from mysite.model.user import User
from mysite.model.const.user import STATE_ACTIVE
from mysite.util.orm import ormiter
from progress.bar import Bar


if __name__ == '__main__':
    bar = Bar('Processing', max=User.where().count(), suffix='%(percent).1f%% - %(eta)ds')
    for user in ormiter(User, where='state>=%s' % STATE_ACTIVE):
        update_user_persona(user.id)
        bar.next()
```