json序列化python

Question

我有 Employee 类，其中包含姓名 age 和 Addresses 列表，其中包含员工的地址列表。

我的代码设计如下

class Employee:
    Name=''
    Age =''
    Addresses =[]

class Address:
   State =''
   District =''
   City=''
adress1 =Address();
adress1.State='West bengal'
adress1.District ='Jalpaiguri'
adress1.City= 'Kolkata'

adress2 =Address()
adress2.State='West Bengal'
adress2.District ='Darjeeling'
adress2.City= 'Siliguri'
employee =Employee()
employee.name ='Gunjan'
employee.age =22
employee.Addresses.append(adress1)
employee.Addresses.append(adress2)

我想将员工转换为 json 表示。我试过了

json.dumps(employee.__dict__).

但这只是给我 Employee 的 name 和 age 属性，而不是它包含的地址列表。

如果有人能指导我获得完美的 json 表示形式，那将是非常有帮助的-

{"name":"Gunjan","Age":"22","Addresses" :[{"State":"West Bengal","City":"Siliguri","District":"Darjeeling" },{"州":"西孟加拉邦","城市":"加尔各答","区":"New Jalpaiguri"}]}

谢谢

Answer 1

实际上，您正在尝试创建一个可以转换为 JSON 的字典，而不是直接创建 JSON 表示（Python 允许这两种技术）。

要创建字典，试试这个：

class Employee(object):
    def __init__(self, name, age):
        self.name = name
        self.age = age
        self.addresses = []

    @property
    def __dict__(self):
        return {
            "name": self.name,
            "age": self.age,
            "addresses": [addr.__dict__ for addr in self.addresses]
        }


class Address(object):
    def __init__(self, state, district, city):
        self.state = state
        self.district = district
        self.city = city

employee = Employee("Gunjan", 22)
employee.addresses.append(Address("West Bengal", "Jalpaiguri", "Kolkata"))
employee.addresses.append(Address("West Bengal", "Darjeeling", "Siliguri"))

print employee.__dict__

它应该打印：

{'age': 22, 'name': 'Gunjan', 'addresses': [{'city': 'Kolkata', 'state': 'West Bengal', 'district': 'Jalpaiguri'}, {'city': 'Siliguri', 'state': 'West Bengal', 'district': 'Darjeeling'}]}

Answer 2

没什么，python中类成员的约定是小写的。

另一个问题是您调用了emplyee.name，而您的成员是Name。

如果你想在你的类中使用数据成员，你应该写 self.name 例如。

如您所见，我实现了转储功能，如果一个类有对象列表，这是一个问题，我不知道任何直接的解决方案。

我为你编写了符合你意图的代码。

import json
class Employee:
    def __init__(self):
        self.name=''
        self.age =''
        self.addresses =[]

    def dump(self):
        return {"Name": self.name,
                "Age": self.age,
                "Addresses": [addr.__dict__ for addr in self.addresses]}

class Address:
    def __init__(self):
       self.state =''
       self.district =''
       self.city=''

adress1 =Address()
adress1.state='West bengal'
adress1.district ='Jalpaiguri'
adress1.city= 'Kolkata'

adress2 =Address()
adress2.state='West Bengal'
adress2.district ='Darjeeling'
adress2.city= 'Siliguri'

employee =Employee()
employee.name ='Gunjan'
employee.age =22
employee.addresses.append(adress1)
employee.addresses.append(adress2)

print json.dumps(employee.dump())

结果：

{"Age": 22, "Name": "Gunjan", "Addresses": [{"City": "", "State": "", "District": ""}, {"City": "Siliguri", "State": "West Bengal", "District": "Darjeeling"}]}