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                1、len(),列表中有多少項 ``` numbers = [1,2,3] print len(numbers) ``` 2、count(),某個項有多少個 ``` color_List = ['red','blue','magenta','red','yellow'] print color_List.count('red') ``` 3、index(),查找某個值的索引![] ``` color_List = ['red','blue','magenta','red','yellow'] print color_List.index('blue') ```
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