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ithelloworld
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python dict vs ruby hash

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  •   ithelloworld 2013-03-22 14:35:28 +08:00 3338 次点击
    这是一个创建于 4635 天前的主题,其中的信息可能已经有所发展或是发生改变。
    ruby中hash

    grades = Hash.new
    grades["a"] << 1
    grades["b"] << 2
    grades["c"] << 3
    ...

    这样的用法,python用dict怎么实现?

    注意不是给一个key简单地赋值,而是要用 grades["a"] 装很多值。
    4 条回复    1970-01-01 08:00:00 +08:00
    binux
        1
    binux  
       2013-03-22 14:37:18 +08:00
    grades.setdefault("a", []).append(1)
    ithelloworld
        2
    ithelloworld  
    OP
       2013-03-22 14:54:52 +08:00
    @binux 以此类推,其它的值这样添加?

    grades.setdefault("b", []).append(2)
    grades.setdefault("c", []).append(3)
    orzfly
        3
    orzfly  
       2013-03-22 17:23:13 +08:00
    我怎么都觉得是Hash.new{[]}吧
    ithelloworld
        4
    ithelloworld  
    OP
       2013-03-22 17:33:51 +08:00
    @orzfly 你是说ruby的写法吗?应该是这样:

    Hash.new{|h, key| h[key] = []}
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