Django: using form in views

Some way to use forms in views:
blank form or form with some content:
if request.method=='GET':
   form1=SelectForm(request.GET)
else:
   form1=SelectForm()

And than we send to form necessary corteges for "select" elements (each cortege include  few two-elements cortege and like as ((,),(,),(,),...,(,)) ):
form1.fields['select1'].

choices=((1,'First'),(2,'Second'),(3,'Third'))

We can get data from form:
datas=[]
if form1.is_valid():
   datas=form1.cleaned_data
   dd=datas['select2']

( format of the value "cleaned_data" is dict() )