使用openweathermap api解析字典（json）中的数据

Question

在探索、学习的过程中，我对 Python 还是很陌生，而今天我正在使用 JSON。每次出现在我的字典中时，如何解析和打印“dt_txt”键和相应的值？这是我的代码。

import requests, pytemperature, json

r = requests.get('http://samples.openweathermap.org/data/2.5/forecast?
lat=35&lon=139&appid=b1b15e88fa797225412429c1c50c122a1')
dict = r.json()

for key, value in dict.items():
    if 'dt_txt' in str(key):
        print(key)

这是 JSON 快照或上面链接中的完整内容。

    {
"cod": "200",
"message": 0.179,
"cnt": 40,
"list": [{
        "dt": 1509202800,
        "main": {
            "temp": 297.18,
            "temp_min": 291.573,
            "temp_max": 297.18,
            "pressure": 1027.02,
            "sea_level": 1029.75,
            "grnd_level": 1027.02,
            "humidity": 68,
            "temp_kf": 5.6
        },
        "weather": [{
                "id": 500,
                "main": "Rain",
                "description": "light rain",
                "icon": "10d"
            }
        ],
        "clouds": {
            "all": 88
        },
        "wind": {
            "speed": 1.61,
            "deg": 99.0033
        },
        "rain": {
            "3h": 0.09
        },
        "sys": {
            "pod": "d"
        },
        "dt_txt": "2017-10-28 15:00:00"
    }, {
        "dt": 1509213600,
        "main": {
            "temp": 297.32,
            "temp_min": 293.116,
            "temp_max": 297.32,
            "pressure": 1024.56,
            "sea_level": 1027.16,
            "grnd_level": 1024.56,
            "humidity": 76,
            "temp_kf": 4.2
        },
        "weather": [{
                "id": 500,
                "main": "Rain",
                "description": "light rain",
                "icon": "10d"
            }
        ],
        "clouds": {
            "all": 48
        },
        "wind": {
            "speed": 1.96,
            "deg": 173.002
        },
        "rain": {
            "3h": 0.41
        },
        "sys": {
            "pod": "d"
        },
        "dt_txt": "2017-10-28 18:00:00"

旁注：最后我尝试打印日期、temp_min、temp_max、main 和描述。我会将温度从开尔文转换为华氏温度，然后每天使用 gmail 向我发送新预测的短信。提前感谢您的帮助！

Answer 1

您可以通过 your_dict['your_value'] 所有每个 dict 键，试试这个：

import requests, json

r = requests.get('http://samples.openweathermap.org/data/2.5/forecast?lat=35&lon=139&appid=b1b15e88fa797225412429c1c50c122a1')
dict = r.json()
select_data = dict['list']

for box in select_data:

    if 'dt_txt' in box:
        print(box['dt_txt'])

    else:
        print('not found')