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！