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  • Python基础——切片实例

    切片实例

    L = list(range(100))
    print(L, end=' ')
    
    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99] 
    

    取前10个元素L[:10]

    L[:10]
    
    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
    

    取后10个元素L[-10:]

    L[-10:]
    
    [90, 91, 92, 93, 94, 95, 96, 97, 98, 99]
    

    取10--20元素L[10:20]

    L[10:20]
    
    [10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
    

    在前10个数中,间隔为2L[:10:2]

    L[:10:2]
    
    [0, 2, 4, 6, 8]
    

    所有数中,间隔为5L[::5]

    L[::5]
    
    [0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95]
    

    原样复制L[:]

    L[:]
    
    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]
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  • 原文地址:https://www.cnblogs.com/brightyuxl/p/10125411.html
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