import jsonclass CustomEncoder(json.JSONEncoder): def default(self, obj): if isinstance(obj, Player): return {"name": obj.name, "points": obj.points} return super().default(obj)player = Player("Stephen Curry", 32.0)print(json.dumps(player, cls=CustomEncoder))json 包在Pyth...
一.json模块 JSON(JavaScript Object Notation) 是一种轻量级的数据交换格式,易于人阅读和编写。 JSON函数: 使用JSON之前必须导入json库: import json json.dumps 用于将 Python 对象编码成 JSON 字符串 例子: import json data={'a':1,'2':1,'c':3} j=json.dumps(data) #将一个python字典转换为json对象...
"age":obj.age}raiseTypeError("Object of type 'Person' is not JSON serializable")# 创建一个Person实例person_instance=Person(name="Emma",age=28)# 序列化为JSON字符串json_string_custom=json.dumps(person_instance,default=person_encoder,indent=2)print(json_string_custom)...
首先,我们需要导入json模块,以便使用其中的JSONEncoder类。代码如下所示: importjson 1. 步骤2:自定义JSONEncoder子类 接下来,我们将创建一个自定义的JSONEncoder子类,并重写其中的default()方法,以便处理中文字符。代码如下所示: classChineseEncoder(json.JSONEncoder):defdefault(self,obj):ifisinstance(obj,str):re...
1import json2fromdatetime import date3fromdatetime import datetime456classJsonCustomEncoder(json.JSONEncoder):78defdefault(self, obj):9ifisinstance(obj, datetime):10returnobj.strftime('%Y-%m-%d %H:%M:%S')11elif isinstance(obj, date):12returnobj.strftime('%Y-%m-%d')13else:14returnjson.JSONEnc...
Closes #20950. Allows a custom json encoder function to be passed to json_normalize, enabling the caller to target specific performance/behaviour. Minor speedup (~6% faster on test data) from opti...
To use a custom JSONEncoder subclass (e.g. one that overrides the .default() method to serialize additional types), specify it with the cls kwarg; otherwise JSONEncoder is used.'''#json的格式化输出 import json data = {'username':['李华','二愣子'],'sex':'male','age':16} json_...
company_obj=Company(1)json_string=json.dumps(company_obj,default=custom_encoder,sort_keys=True,indent=4) # 反序列化 company_obj=json.loads(json_string,object_hook=custom_decoder) 其实通过上面得了解知道,用上面得方法可以非常轻松的将复杂的数据结构序列化为JSON字符串,并在需要时将其反序列化为原...
skill_id'inobj:returnSkill(obj['skill_id'])elif'foo_id'inobj:returnFoo(obj['foo_id'])else:returnobj# 序列化company_obj=Company(1)json_string=json.dumps(company_obj,default=custom_encoder,sort_keys=True,indent=4)# 反序列化company_obj=json.loads(json_string,object_hook=custom_...
for JSON integers (e.g. float). ``parse_constant``, if specified, will be called with one of the following strings: -Infinity, Infinity, NaN. This can be used to raise an exception if invalid JSON numbers are encountered. To use a custom ``JSONDecoder`` subclass, specify it with the...