dict及增删查改 02

改

dic1 = {'age':16,'name':'套你大象','sex':',male','weight':'67'}
dic2 = {'age':45,'sex':',male'}
dic2.update(dic1)#将dict1中的数据更新到dict2中，有更改，没有添加
print(dic1)
print(dic2)

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dic1 = {'age':16,'name':'套你大象','sex':',male','weight':'67'}
dic1['age'] = '19'
print(dic1)

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 查

dic1 = {'age':16,'name':'套你大象','sex':',male','weight':'67'}
print(dic1.keys())#键
print(dic1.items())#值
print(dic1.values())#元组，元组中含有键值

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dic1 = {'age':16,'name':'套你大象','sex':',male','weight':'67'}
# print(dic1.keys())#键
# print(dic1.items())#值
# print(dic1.values())#元组，元组中含有键值

for i in dic1.values():
    print(i)

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也可以使用for循环来查询，其他两个类似。

dic1 = {'age':16,'name':'套你大象','sex':',male','weight':'67'}
l = dic1['age']#直接返回值，但是若字典中没有这个键，则会报错
print(l)

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