test.py

>>> def f(a, b, *args, **kwargs):
...     print 'a:', a
...     print 'b:', b
...     print 'args:', args
...     print 'kwargs:', kwargs
...
>>>
>>> f(1, 2, 3, 4)
a: 1
b: 2
args: (3, 4)
kwargs: {}
>>> f(1, 2, 3, 4, banana=7, apple=9)
a: 1
b: 2
args: (3, 4)
kwargs: {'banana': 7, 'apple': 9}