Python 自定义 JSON Encoder
继承 json.JSONEncoder 类, 重载 default 方法
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 | def convert_time(dt: DateTime):pdt = datetime(dt.year, dt.month, dt.day, dt.hour, dt.minute,
 int(dt.second), int(dt.second * 1000000 % 1000000))
 return pdt
 
 
 class CustomJSONEncoder(JSONEncoder):
 def default(self, o):
 if isinstance(o, DateTime):
 return super(CustomJSONEncoder, self).encode(convert_time(o).isoformat())
 return super(CustomJSONEncoder, self).default(o)
 
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