python - 尝试从Darksky API获取值列表时出错

Question

我要完成的工作:我想从darksky API获取 future 7天的最高温度，最低温度和时间列表。当我尝试打印变量时，我一直收到此消息(TypeError:“float”对象不可下标)。最终结果是使用pandas将此数据导入到Dataframe中，代码显然没有完成。

同样，答案可能是显而易见的(在这里newb)。谢谢大家的帮助!

import pandas as pd 
import requests
import json 

key = '(my dark sky api key)'
url = 'https://api.darksky.net/forecast/%s/43.0481221,-76.147424' % (key)
response = requests.get(url)
weather_data = response.json()
time = weather_data['currently']['apparentTemperature']['daily']['data'][0:8]['time']
temperature_min = weather_data['currently']['apparentTemperature']['daily']['data'][0:8]['apparentTemperatureMin']
temperature_max = weather_data['currently']['apparentTemperature']['daily']['data'][0:8]['apparentTemperatureMax']

print(temperature_min)

TypeError: 'float' object is not subscriptable

Answer 1

显然问题出在您试图用来检索所需数据的数据结构和索引。
weather_data['currently']将给您字典对象:

{'apparentTemperature': 57.44,
 'cloudCover': 0.29,
 'dewPoint': 33.07,
 'humidity': 0.4,
 'icon': 'partly-cloudy-day',
 'nearestStormBearing': 242,
 'nearestStormDistance': 436,
 'ozone': 358.37,
 'precipIntensity': 0,
 'precipProbability': 0,
 'pressure': 1028.68,
 'summary': 'Partly Cloudy',
 'temperature': 57.44,
 'time': 1492546503,
 'visibility': 10,
 'windBearing': 4,
 'windSpeed': 2.16}

weather_data['currently']['apparentTemperature']给出float号57.44。当您进一步尝试下标时，会出现错误，因为浮点数不可下标。我建议研究更多的weather_data数据结构，并选择正确的索引以提供所需的数据。

尝试这个:

time = [weather_data['daily']['data'][k]['time'] for k in range(0,8)]
temperature_min = [weather_data['daily']['data'][k]['apparentTemperatureMin'] for k in range(0,8)]
temperature_max = [weather_data['daily']['data'][k]['apparentTemperatureMax'] for k in range(0,8)]

在这里，列表推导用于检索8天的数据。如果您想接收某些特定日期，请使用特定日期的list(例如[2,5,6])而不是range(0,8)