如果对象是可迭代的(任何序列),则可以进行分解操作,包括元组、列表、字符串、文件、迭代器以及生成器,可通过简单的一个赋值操作分解为单独的变量。
唯一要求:变量的总数和序列相吻合,否则将出错;
Python 2.7.11 (v2.7.11:6d1b6a68f775, Dec 5 2015, 20:32:19) [MSC v.1500 32 bit (Intel)] on win32 Type "copyright", "credits" or "license()" for more information. >>> p=[4,5] >>> p [4, 5] >>> x,y=p >>> x 4 >>> y 5 >>> data=[‘lucy‘,50,12.1,(2016,07,31)] >>> data [‘lucy‘, 50, 12.1, (2016, 7, 31)] >>> name,shares,price,date=data >>> name ‘lucy‘ >>> shares 50 >>> price 12.1 >>> date (2016, 7, 31) >>> name,shares,price,(year,mon,day)=data >>> name ‘lucy‘ >>> shares 50 >>> price 12.1 >>> year 2016 >>> mon 7 >>> day 31 >>> s=‘hello‘ >>> s ‘hello‘ >>> a,b,c,d,e=s >>> c ‘l‘ >>> d ‘l‘ >>> e ‘o‘ >>> data=[‘lucy‘,50,12.1,(2016,07,31)] >>> _,shares,price,_=data #当想丢弃某些值时,可以选一个用不到的变量名作为要丢弃的值的名称,比如此处“_” >>> shares 50 >>> price 12.1 >>>
注意:请确保丢弃的值选择的变量名在其他地方未曾用到过。
时间: 2024-12-29 07:20:39