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  • Python自动化之字典

    #Author wangmengzhu

    ##clear
    # dic = {'k1':'v1','k2':'v2'}
    # dic.clear()
    # print(dic)

    ##copy
    # dic = {'k1':'v1','k2':'v2'}
    # v = dic.copy()
    # print(v)
    # print(dic)
    # {'k1': 'v1', 'k2': 'v2'}
    # {'k1': 'v1', 'k2': 'v2'}

    ##fromkeys
    # dic = {}
    # dic = dic.fromkeys(['k1','k2'],'num')
    # print(dic)
    ##{'k1': 'num', 'k2': 'num'}

    # dic = {'k1':'v1','k2':'v2'}
    # v = dic.get('k1')
    # print(v)##获取键值

    ##返回字典中所有的键值对
    # dic = {'k1':'v1','k2':'v2'}
    # v = dic.items()
    # print(v)


    ##用于返回字典中的键
    # dic = {'k1':'v1','k2':'v2'}
    # v = dic.keys()
    # print(v)




    ##获取并删除对应的value值
    # dic = {'k1':'v1','k2':'v2'}
    # v = dic.pop('k1')
    # print(v)
    # print(dic)



    ##随机删除一个键值对,并且获取删除的键值
    # dic = {'k1':'v1','k2':'v2'}
    # v = dic.popitem()
    # print(v)
    # print(dic)

    ##增加,如果键值对存在不做任何操作
    # dic = {'k1':'v1','k2':'v2'}
    # v = dic.setdefault('k3','v3')
    # print(v)
    # print(dic)


    ##批量增加或者修改
    # dic = {'k1':'v1','k2':'v2'}
    # v = dic.update({'k3':'v3','k1':'v6'})
    # print(dic)

    ##取出字典中的值
    # dic = {'k1':'v1','k2':'v2'}
    # v = dic.values()
    # print(v)
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  • 原文地址:https://www.cnblogs.com/wangmengzhu/p/7133094.html
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