怎么给now赋一个初始值?
"now": {
"obsTime": "2020-06-30T21:40+08:00",
"temp": "24",
"feelsLike": "26",
"icon": "101",
"text": "多云",
"wind360": "123",
"windDir": "东南风",
"windScale": "1",
"windSpeed": "3",
"humidity": "72",
"precip": "0.0",
"pressure": "1003",
"vis": "16",
"cloud": "10",
"dew": "21"
},