python不定长参数举例说明_Python的不定长参数

以一个＊开始的参数，代表一个任意长的元组：

>>> def mul(*arg):

...     print arg

...

>>> mul(1,2,3,4,5,6,7,'hello','panfei')

(1, 2, 3, 4, 5, 6, 7, 'hello', 'panfei') ＃一个元组

>>>

＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊

一个以＊＊开始的参数，代表一个字典：

>>> def mul2(**arg):

...     print arg

...

>>> mul2(a=11,b=444,c=888)

{'a': 11, 'c': 888, 'b': 444} 一个字典

>>>

＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊

两种参数前者可以直接写实参，后者写成名＝值的形式！

(转载自： http://blog.163.com/hevensun@126/blog/static/20153363201272910241831/)

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