def foo(*args,**kwargs):

    print 'args=',args

    print 'kwargs=',kwargs

    print '---------------------------'

if __name__=='__main__':

    foo(1,2,3,4)

    foo(a=1,b=2,c=3)

    foo(1,2,3,4,a=1,b=2,c=3)

    foo('a',1,None,a=1,b='',c=3)

/usr/bin/python2.7 /home/alex/PycharmProjects/unittest_learn/new_confuze.py

args= (1, 2, 3, 4)

kwargs= {}

---------------------------

args= ()

kwargs= {'a': 1, 'c': 3, 'b': 2}

---------------------------

args= (1, 2, 3, 4)

kwargs= {'a': 1, 'c': 3, 'b': 2}

---------------------------

args= ('a', 1, None)

kwargs= {'a': 1, 'c': 3, 'b': ''}

---------------------------

Process finished with exit code 0