想要用python自已手动序列化嵌套类,就要明白两个问题:
1.Json是什么?
2.Json支持什么类型?
答案显而易见
Json就是嵌套对象
Json在python中支持列表,字典(当然也支持int,string.....,不过说这个也没多大必要)
很好,等等,列表,字典?我们在python中学过列表,字典,字典列表,列表字典,字典字典,那,我们可不可以把类对象转化为这些呢?
我可以很确定的告诉你,可以,并且,嵌套类都可以!!!
下面就来实战:
from flask import Flask
import json
app = Flask(__name__)
class City():
def __init__(self,country,provider):
self.country = country
self.provider = provider
class School():
def __init__(self,country,provider,name,nums):
self.city = City(country,provider)
self.name = name
self.nums = nums
@app.route('/method0')
def method0():
school = School('china','shanxi','wutaizhongxue','2000')
s_temp0 = [school.city.country,school.city.provider,school.name,school.nums]
return json.dumps(s_temp0)
@app.route('/method1')
def method1():
school = School('china','shanxi','wutaizhongxue','2000')
s_temp1 = {'country':school.city.country,'provider':school.city.provider,'name':school.name,'nums':school.nums}
return json.dumps(s_temp1)
@app.route('/method2')
def method2():
school = School('china','shanxi','wutaizhongxue','2000')
s_temp2 = [{'country':school.city.country,'provider':school.city.provider},school.name,school.nums]
return json.dumps(s_temp2)
@app.route('/method3')
def method3():
school = School('china','shanxi','wutaizhongxue','2000')
s_temp3 = {'city':[school.city.country,school.city.provider],'name':school.name,'nums':school.nums}
return json.dumps(s_temp3)
@app.route('/method4')
def method4():
school = School('china','shanxi','wutaizhongxue','2000')
s_temp4 = {'city':{'country':school.city.country,'provider':school.city.provider},'name':school.name,'nums':school.nums}
return json.dumps(s_temp4)
if __name__ == '__main__':
app.run(debug=True)
执行效果:
很多人会说,第五种才是我想要的,前面四种不是标准的json数据,刚开始确实是这样认为的,但是。。。
1.如果你处理的两个嵌套类是数据库的呢?假比如一对多的关系型数据库,method3不是一个很好的选择么?
2.如果你处理的两个嵌套类是包含关系呢?method2不是一个很好的选择么?
。。。。。。
多说无益,需要你自己体会