python json序列化问题

1. TypeError: Object of type ‘Decimal’ is not JSON serializable

import decimal
import json


class CJsonEncoder(json.JSONEncoder):
    """
    json格式化问题，解决python不能序列化问题
    """

    def default(self, obj):
        if isinstance(obj, decimal.Decimal):
            return float(obj)
        else:
            return json.JSONEncoder.default(self, obj)

2. TypeError: Object of type ‘type’ is not JSON serializable

import json
 
class BytesEncoder(json.JSONEncoder):
    def default(self,obj):
        if isinstance(obj,bytes):
           return str(obj,encoding='utf-8')
        return json.JSONEncoder.default(self,obj)

3. TypeError: datetime.datetime(····) is not JSON serial

import json

from datetime import datetime, date

   class CJsonEncoder(json.JSONEncoder):
       """
       json格式化问题，解决python时间格式不能序列化问题
       """
   
       def default(self, obj):
           if isinstance(obj, datetime):
               return obj.strftime('%Y-%m-%d %H:%M:%S')
           elif isinstance(obj, date):
               return obj.strftime("%Y-%m-%d")
           else:
               return json.JSONEncoder.default(self, obj)
   

使用方法

import json
data = {"...":"..."}
json.dumps(data, cls=CJsonEncoder)