python之字典

                                       字典包含的信息量大！

 

 

1：定义字典：

 >>> zidian={'付超':'01','张小亮':'02','李小毛':'03'}
>>>

2：字典的组成 key：value，key：value

3：查看value

>>> zidian.values()
dict_values(['02', '01', '03'])

4：字典的添加：

>>> zidian['添加']='123'
>>> zidian
{'张小亮': '02', '付超': '01', '李小毛': '03', '添加': '123'}
>>>
5：字典的删除

>>> zidian
{'张小亮': '02', '付超': '01', '李小毛': '03', '添加': '123'}
>>> zidian.popitem()
('张小亮', '02')
>>>

>>> zidian
{'付超': '666', '李小毛': '03', '添加': '123'}
>>> del zidian['添加']
>>> zidian
{'付超': '666', '李小毛': '03'}
>>>

6：字典的修改

>>> zidian['付超']='666'
>>> zidian
{'付超': '666', '李小毛': '03', '添加': '123'}
>>>

7：字典的查找

>>> zidian
{'付超': '666', '李小毛': '03'}
>>> '付超' in zidian
True
>>>