gistfile1.py

>>> class PopulableForm(forms.Form):
...     def populate(self, other):
...         for k, v in self.cleaned_data.items():
...             if hasattr(other, k):
...                 setattr(other, k, v)
...             else:
...                 try:
...                     other[k] = v
...                 except TypeError:
...                     continue
...
>>> class FooForm(PopulableForm):
...     a = forms.CharField()
...     b = forms.CharField()
...
>>>
>>> f = FooForm({'a':1,'b':2})
>>> f.is_valid()
True
>>> d = {}
>>> f.populate(d)
>>> d
{'a': u'1', 'b': u'2'}
>>> class FooObject(object):
...     def __init__(self):
...         self.a = None
...         self.b = None
...
>>>
>>> foo_ob = FooObject()
>>> foo_ob.a
>>> foo_ob.b
>>> f.populate(foo_ob)
>>> foo_ob.b
u'2'
>>> foo_ob.a
u'1'
>>>