方法返回TypeError：列表索引必须是整数或片，而不是str

Question

我使用openweathermap获取天气数据，它返回一个JSON对象，如下所示：

blank = {
    "coord": {"lon": -92.11, "lat": 46.78},
    "weather": [
        {"id": 800, "main": "Unknown", "description": "Unknown", "icon": "01d"}
    ],
    "base": "stations",
    "main": {
        "temp": 0,
        "feels_like": 0,
        "temp_min": 0,
        "temp_max": 0,
        "pressure": 0,
        "humidity": 0,
    },
    "visibility": 0,
    "wind": {"speed": 0, "deg": 0},
    "clouds": {"all": 1},
    "dt": 0,
    "sys": {"type": 1, "id": 3903, "country": "US", "sunrise": 0, "sunset": 0},
    "timezone": 0,
    "id": 0,
    "name": "Unknown",
    "cod": 0,
}

我在["weather"]["description"]上返回字符串时遇到问题。这将引发类型错误TypeError: list indices must be integers or slices, not str

方法：

class OpenWeather:
    def descrip(self):
        return self.data["weather"]["description"]

有人要小费吗

Answer 1

应该是

class OpenWeather:
    def descrip(self):
        return self.data["weather"][0]["description"]
        #                          ^^^

或者某种列表理解，比如weather是一个列表（可能是一个字典列表，但您的示例只包含一个字典）