python变长参数的函数

def tupleVarArgs(arg1,arg2='defaultB',*theRest):
    'display regular args and non-keywork variable args'
    print 'formal arg1:',arg1
    print 'formal arg2:',arg2

    for eachXtrArg in theRest:
        print 'another arg:',eachXtrArg

>>> tupleVarArgs('abc')
formal arg1: abc
formal arg2: defaultB
>>> tupleVarArgs(23,4.56)
formal arg1: 23
formal arg2: 4.56
>>> tupleVarArgs('abc',123,'xyz',456.789)
formal arg1: abc
formal arg2: 123
another arg: xyz
another arg: 456.789

def dictVarArgs(arg1,arg2='defaultB',**theRest):
    'display regular args and non-keywork variable args'
    print 'formal arg1:',arg1
    print 'formal arg2:',arg2

    for eachXtrArg in theRest.keys():
        print 'Xtra arg %s: %s'%\
              (eachXtrArg,str(theRest[eachXtrArg]))

>>> dictVarArgs(1111,745,c='test')
formal arg1: 1111
formal arg2: 745
Xtra arg c: test
>>> dictVarArgs(arg2='arg2',c=123,d='ddd',arg1='mystery')
formal arg1: mystery
formal arg2: arg2
Xtra arg c: 123
Xtra arg d: ddd
>>> dictVarArgs('one',d=10,e='zoo',men=('freud','gaudi'))
formal arg1: one
formal arg2: defaultB
Xtra arg men: ('freud', 'gaudi')
Xtra arg e: zoo
Xtra arg d: 10

def dictVarArgs(arg1,arg2='defaultB',*theRest2,**theRest):
    'display regular args and non-keywork variable args'
    print 'formal arg1:',arg1
    print 'formal arg2:',arg2

    for eachXtrArg in theRest.keys():
        print 'Xtra arg %s: %s'%\
              (eachXtrArg,str(theRest[eachXtrArg]))


    for rest2 in theRest2:
        print 'Xtra2 arg %s:' % rest2

>>> dictVarArgs(1,theRest2='abc',theRest=['def','hjk'])
formal arg1: 1
formal arg2: defaultB
Xtra arg theRest: ['def', 'hjk']
Xtra arg theRest2: abc