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  • python_字典

    1.获取字典的所有键

    info = {'name':'wdc','age':18,'gender':''}
    # 打印字典的所有键
    for i in info.keys():
        print(i)

    2.获取字典的所有值

    info = {'name':'wdc','age':18,'gender':''}
    # 打印字典的所有值
    for i in info.values():
        print(i)

    3.获取字典的键和值

    info = {'name':'wdc','age':18,'gender':''}
    # 将键和值分别赋给i和j
    for i,j in info.items():
        print(i,j)

    info = {'name':'wdc','age':18,'gender':'男'}
    # 将字典的每个键值对生成一个元组
    for i in info.items():
    print(i)

     4.修改和增加元素

    info = {'name':'wdc','age':18,'gender':''}
    # 如果字典中已经有了xvehao键则修改,否则酒增加
    info['xvehao'] = 123
    print(info)

    5.删除元素

    info = {'name':'wdc','age':18,'gender':''}
    # 删除键为gender的键值对
    del info['gender']
    print(info)

     6.删除元素并获取其值

    info = {'name':'wdc','age':18,'gender':''}
    # 删除键为'name'的键值对,并返回其值
    qqq = info.pop('name')
    print(info)
    print(qqq)
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  • 原文地址:https://www.cnblogs.com/wangdianchao/p/11390394.html
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