Multiple imports for the same

For example:
In mi file forms.py

from directaerp.establecimiento.models import *

...
..

If I want use a class that is into directaerp/establecimiento/models.py called ConfiguracionPago(), I select it from the
contextual list:
Ex:
configuracion_pago = ConfiguracionPago()

Then in my imports statement is add a new import line:
from directaerp.establecimiento.models import ConfiguracionPago
from directaerp.establecimiento.models import *

The new import line its no necesary.

Please, also consider when the import is like:
from models import *
This form also is valid too in python language