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  • python中向集合中增加元素和删除元素

    1、集合单个增加元素

    >>> a = {111,222,333,444}
    >>> a
    {444, 333, 222, 111}
    >>> type(a)
    <class 'set'>
    >>> a.add(555)
    >>> a
    {555, 333, 111, 444, 222}
    >>> a.add("aaa")
    >>> a
    {555, 333, 111, 'aaa', 444, 222}

    2、集合批量增加元素

    >>> a = {111,222,333}
    >>> a
    {333, 222, 111}
    >>> type(a)
    <class 'set'>
    >>> b = ["aaa","bbb","ccc"]
    >>> b
    ['aaa', 'bbb', 'ccc']
    >>> type(b)
    <class 'list'>
    >>> for i in b:
        a.add(i)
    
        
    >>> a
    {'ccc', 333, 111, 'bbb', 222, 'aaa'}

    3、单个删除元素

    >>> a = {"aaa","bbb","ccc"}
    >>> a
    {'aaa', 'ccc', 'bbb'}
    >>> type(a)
    <class 'set'>
    >>> a.remove("aaa")
    >>> a
    {'ccc', 'bbb'}
    >>> a.remove("ccc")
    >>> a
    {'bbb'}

    4、批量删除元素

    >>> a = {"aaa","bbb","ccc","ddd","eee","fff","ggg","hhh","iii"}
    >>> a
    {'ccc', 'ggg', 'hhh', 'bbb', 'fff', 'eee', 'iii', 'ddd', 'aaa'}
    >>> type(a)
    <class 'set'>
    >>> b = ("aaa","bbb","ccc","ddd")
    >>> b
    ('aaa', 'bbb', 'ccc', 'ddd')
    >>> type(b)
    <class 'tuple'>
    >>> for i in b:
        a.remove(i)
    
        
    >>> a
    {'ggg', 'hhh', 'fff', 'eee', 'iii'}
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  • 原文地址:https://www.cnblogs.com/liujiaxin2018/p/14473470.html
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