Python cookbook（数据结构与算法）从任意长度的可迭代对象中分解元素操作示例

Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:43:06) [MSC v.1600 32 bit (Intel)] on win32
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> *headdata,current=[10,3,2,6,8,5] #*修饰的变量位于列表第一个位置，轻松分别头部和尾部
> headdata
[10, 3, 2, 6, 8]
> current
5
> record=('dave','dave@example.com','773-555-1212','847-555-1212')
> name,email,*phone_numbers=record#*修饰的变量位于列表最后一个位置
> name
'dave'
> email
'dave@example.com'
> phone_numbers
['773-555-1212', '847-555-1212']
> line='nobody:*:-2:-3:Unpriviledged User:/var/empty:/usr/bin/false'
> uname,*fields,homedir,sh=line.split(':') #*修饰的变量位于中间位置，且与字符串处理操作相结合
> uname
'nobody'
> homedir
'/var/empty'
> sh
'/usr/bin/false'
> fields
['*', '-2', '-3', 'Unpriviledged User']
> record=['lucy',50,123.4,(12,13,2016)]
> name,*_,(*_,year)=record #将某些分解出的值丢弃
> name
'lucy'
> year
2016
>