1，*args 相当于list列表
def fun_args(farg, *args):
print "arg:", farg
for value in args:
print "another arg:", value
fun_args(1, "2", 3) # *args可以当作可容纳多个变量组成的list
2，**kwargs的用法 相当于字典
def fun_kwargs(farg, **kwargs):
print "arg:", farg
for key in kwargs:
print "another keyword arg: %s: %s" % (key, kwargs[key])
fun_kwargs(farg=1, myarg2="2", myarg3=3)