# --------------------------------------------------------- #
tags = ['Python', 'Json', 'Python基本']
# --------------------------------------------------------- #
import json
class SampleVal:
    def __init__(self):
        self.val = 10
        self.foo = "var"
class Encode(json.JSONEncoder):
    def default(self, o):
        print(o)
        return json.JSONEncoder.default(self, o)
a = SampleVal()
js = json.dumps(a, cls=Encode)
js.