[英]Serialize a list of custom objects
I am creating an list of custom objects from a database. 我正在从数据库创建自定义对象列表。 The custom object class and the list creation is shown below. 自定义对象类和列表创建如下所示。 How can I serialize the list holding this custom data? 如何序列化保存此自定义数据的列表?
class MyCustomObject():
"""For displaying the records"""
def __init__(self):
self.rec_id = ""
self.place = ""
rec_list = [] #The List
# Creating a list of MyCustomObject's from rows
for col in rows:
rec = MyCustomObject()
rec.rec_id = col[0]
rec.place = col[1]
rec_list.append(recently_viewed)
How can I serialize this list of MyCustomObject
s to JSON. 如何将此MyCustomObject
列表序列化为JSON。
you could try writing your own serializer as below: 您可以尝试编写自己的序列化程序,如下所示:
import json
class MyCustomObject():
"""For displaying the records"""
def __init__(self):
self.rec_id = ""
self.place = ""
class mySerializer(json.JSONEncoder):
def default(self, obj):
return obj.__dict__
rec_list = [] #The List
# Creating a list of MyCustomObject's from rows
rows = [[1,2],[3,4]]
for col in rows:
rec = MyCustomObject()
rec.rec_id = col[0]
rec.place = col[1]
rec_list.append(rec)
print [json.dumps(r, cls=mySerializer) for r in rec_list]
output: 输出:
['{"place": 2, "rec_id": 1}', '{"place": 4, "rec_id": 3}']
By extending JsonEncoder ( https://docs.python.org/2/library/json.html#json.JSONEncoder ) 通过扩展JsonEncoder( https://docs.python.org/2/library/json.html#json.JSONEncoder )
So you will get something like; 所以你会得到类似的东西;
import json
class MyJsonEncoder
def default(self, obj):
if isinstance(obj, MyCustomObject):
return {} # dict representation of your object
return super(MyJsonEncoder, self).dumps(obj)
json.dumps(rec_list, encoder=MyJsonEncoder)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.