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data1 = open("c:\\1.txt").readlines()
data2 = open("c:\\2.txt").readlines()

a = set(data1)
b = set(data2)
 print len(a & b)

²»Ã÷°×µÄµØ·½ÈçÏÂ:

1.open()º¯ÊýÓëfile()ÓÐʲô²î£®Ê²Ã´Ê±ÓÃopenʲôʱÓÃfileºÃЩ

2.×îºóÒ»¸ölen(a & b)ÖÐÓÐ"&"ÊÇʲôÒâ˼£¿

лл¸÷λ£¡
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file其实是open的一个引用.一样的


>>> set1 = set(['a','b','c'])
>>> set2 = set(['b','c','d'])
>>> set1 & set2
set(['c', 'b'])

& 是set类型的一个方法,求相同部分





On Dec 4, 2007 9:24 AM, 篱笆 <nameliba在gmail.com> wrote:
>
> 代码如下．
> data1 = open("c:\\1.txt").
> readlines()
> data2 = open("c:\\2.txt").readlines
> ()
>
> a = set(data1)
> b = set(data2)
>
> print len(a & b)
>
> 不明白的地方如下:
> 1.open()函数与file()有什么差．什么时用open什么时用file好些
> 2.最后一个len
> (a & b)中有"&"是什么意思？
> 谢谢各位！
>
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Õâ¸ö & ±È½ÏÓÐÒâ˼Ŷ
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Ö»ÄÜÔÚÕâ×ÜÇé¿öÏÂÓÃ&°É.Ôٵĵط½Ã»Õâ¸öÒâ˼°É

ÔÚ07-12-4£¬haur <hekun06在gmail.com> дµÀ£º
>
> Õâ¸ö & ±È½ÏÓÐÒâ˼Ŷ
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