Python3表示记录_使用字典

>>> bob={'name':'Bob Smith','age':42,'pay':3000,'job':'dev'}
>>> sue={'name':'Sue Jones','age':45,'pay':4000,'job':'hdw'}
>>> bob['name'],sue['pay']
('Bob Smith', 4000)
>>> bob['name'].split()[-1]
'Smith'
>>> sue['pay'] *=1.10
>>> sue['pay']
4400.0
>>> 

元组数据转换成字典数据

>>> bob = dict(name='Bob Smith',age=42,pay=30000,job='dev')
>>> sue = dict(name='Sue Jones',age=45,pay=40000,job='hdw')
>>> bob,sue
({'name': 'Bob Smith', 'age': 42, 'pay': 30000, 'job': 'dev'}, {'name': 'Sue Jones', 'age': 45, 'pay': 40000, 'job': 'hdw'})
>>> bob
{'name': 'Bob Smith', 'age': 42, 'pay': 30000, 'job': 'dev'}
>>> sue
{'name': 'Sue Jones', 'age': 45, 'pay': 40000, 'job': 'hdw'}
>>> 

一次一个字典地填写字典

>>> sue = {}   ##定义空字典
>>> sue['name']= 'Sue Jones'
>>> sue['age']=45
>>> sue['pay']=40000
>>> sue['job']='hdw'
>>> sue
{'name': 'Sue Jones', 'age': 45, 'pay': 40000, 'job': 'hdw'}
>>> 

使用zip函数将名/值列表连在一起

>>> names = ['name','age','pay','job']
>>> values = ['Sue Jones','45','40000','hdw']
>>> list(zip(names,values))
[('name', 'Sue Jones'), ('age', '45'), ('pay', '40000'), ('job', 'hdw')]
>>> sue = dict(zip(names,values))
>>> sue
{'name': 'Sue Jones', 'age': '45', 'pay': '40000', 'job': 'hdw'}
>>> 

通过一个键序列和所有键的可选初始值来创建字典

>>> fields = ('name','age','jpb','pay')
>>> record = dict.fromkeys(fields,'?')
>>> record
{'name': '?', 'age': '?', 'jpb': '?', 'pay': '?'}
>>>