可变长度参数

def tupleVarArgs(arg1, arg2='defaultB', *theRest):
'display regular args and non-keyword variable args'
print 'formal arg 1:', arg1
print 'formal arg 2:', arg1
for eachXtrArg in theRest:
print 'another arg:', eachXtrArg

>>> tupleVarArgs('abc', 123, 'xyz', 456.789)
formal arg 1: abc
formal arg 2: 123 # 注意默认参数
another arg: xyz
another arg: 456.789

def dictVarArgs(arg1, arg2='defaultB', **theRest):
'display 2 regular args and keyword 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('one', d=10, e='zoo', men=('freud', 'gaudi'))
formal arg1: one
formal arg2: defaultB # 注意默认参数
Xtra arg men: ('freud', 'gaudi')
Xtra arg d: 10
Xtra arg e: zoo