1.定義一個函數fun（*args），該函數的效果如下：
fun(222，111,'xian','hahahha') --》'xian'
fun(7,'name','fensi') -->'fensi'
fun(1,2,3,4) -->None
做法如下：
def fun(*args):
a=args[2]
if type(a)==int:
return None
else:
return a
li=222,111,'xian','hahahah'
lin=[1,2,3]
zhang=[7,'name','fensi']
print fun(*li)
print fun(*lin)
print fun(*zhang)
print fun(1,2,3,4)
2.定義一個func(name=None,**kwargs),該函數的效果爲：
func('liyulong') -->name:'liyulong'
func('liyulong',age=22) --> "name:liyulong, age:22"
func('liyulong',age=22,'weight=50) --> "name:liyulong,age:22,weight:50"
做法如下：
def func(name=None,**kwargs):
print 'name:'+name
for k,w in kwargs.items():
print '%s : %s'%(k,w)
print type(kwargs)
func('liyulong')
func('liyulong',age=22)
func('liyulong',age=22,weight=50)
