Python复杂对象转JSON

Python复杂对象转JSON
在Python对于简单的对象转json还是比较简单的，如下：

import json

d = {'a': 'aaa', 'b': ['b1', 'b2', 'b3'], 'c': 100}
json_str = json.dumps(d)
print json_str
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对于复杂对象，可以使用下面的方法来实现，比如：

import json

class Customer:
def __init__(self, name, grade, age, home, office):
self.name = name
self.grade = grade
self.age = age
self.address = Address(home, office)
def __repr__(self):
return repr((self.name, self.grade, self.age, self.address.home, self.address.office))

class Address:
def __init__(self, home, office):
self.home = home
self.office = office
def __repr__(self):
return repr((self.name, self.grade, self.age))

customers = [
Customer('john', 'A', 15, '111', 'aaa'),
Customer('jane', 'B', 12, '222', 'bbb'),
Customer('dave', 'B', 10, '333', 'ccc'),
]

json_str = json.dumps(customers, default=lambda o: o.__dict__, sort_keys=True, indent=4)
print json_str
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结果如下

[
{
"address": {
"home": "111",
"office": "aaa"
},
"age": 15,
"grade": "A",
"name": "john"
},
{
"address": {
"home": "222",
"office": "bbb"
},
"age": 12,
"grade": "B",
"name": "jane"
},
{
"address": {
"home": "333",
"office": "ccc"
},
"age": 10,
"grade": "B",
"name": "dave"
}
]