python中values、keys、items与*arg，**arg

python中values、keys、items：

>>> dict={1:"one","two":"er",3:"third"}
>>> dict.values()
['one', 'third', 'er']
>>> dict.keys()
[1, 3, 'two']
>>> dict.items()
[(1, 'one'), (3, 'third'), ('two', 'er')]
>>> 

python中*args，**args： 

>>> def s1(*args):
	print args

	
>>> s1("Zof")
('Zof',)

>>> s1("Zof1","Zof2")
('Zof1', 'Zof2')

//调用参数时，args就是元组

>>> def s2(**args):
	print args

>>> s2(p1=2,p2="er")
{'p2': 'er', 'p1': 2}

//调用参数时，args就是字典，**将字典扩展为关键字参数，注意s2中是“=”号！