遍历 JSON 并附加到数据框中
Iterating through JSON and appending into dataframe
我正在从 weatherstack API 获取天气预报数据。
params = {
'access_key': 'enter_key_here',
'query': 'Montreal',
'forecast_days': '2', #two days forecast
'hourly': '1' #API to return weather data split hourly
}
api_result = requests.get('https://api.weatherstack.com/forecast', params)
api_response = api_result.json()
api_response
输出如下所示：
{'request': {'type': 'City',
'query': 'Montreal, Canada',
'language': 'en',
'unit': 'm'},
'location': {'name': 'Montreal',
'country': 'Canada',
'region': 'Quebec',
'lat': '45.500',
'lon': '-73.583',
'timezone_id': 'America/Toronto',
'localtime': '2021-05-11 13:08',
'localtime_epoch': 1620738480,
'utc_offset': '-4.0'},
'current': {'observation_time': '05:08 PM',
'temperature': 11,
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'wind_speed': 31,
'wind_degree': 230,
'wind_dir': 'SW',
'pressure': 1012,
'precip': 1,
'humidity': 58,
'cloudcover': 100,
'feelslike': 8,
'uv_index': 2,
'visibility': 14,
'is_day': 'yes'},
'forecast': {'2021-05-11': {'date': '2021-05-11',
'date_epoch': 1620691200,
'astro': {'sunrise': '05:28 AM',
'sunset': '08:14 PM',
'moonrise': '05:35 AM',
'moonset': '08:14 PM',
'moon_phase': 'Waxing Crescent',
'moon_illumination': 7},
'mintemp': 6,
'maxtemp': 13,
'avgtemp': 8,
'totalsnow': 0,
'sunhour': 12.4,
'uv_index': 6,
'hourly': [{'time': '0',
'temperature': 9,
'wind_speed': 16,
'wind_degree': 240,
'wind_dir': 'WSW',
'weather_code': 119,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0003_white_cloud.png'],
'weather_descriptions': ['Cloudy'],
'precip': 0.1,
'humidity': 74,
'visibility': 10,
'pressure': 1012,
'cloudcover': 75,
'heatindex': 9,
'dewpoint': 5,
'windchill': 7,
'windgust': 23,
'feelslike': 7,
'chanceofrain': 43,
'chanceofremdry': 31,
'chanceofwindy': 0,
'chanceofovercast': 86,
'chanceofsunshine': 5,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1},
{'time': '300',
'temperature': 8,
'wind_speed': 15,
'wind_degree': 247,
'wind_dir': 'WSW',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0,
'humidity': 83,
'visibility': 10,
'pressure': 1012,
'cloudcover': 88,
'heatindex': 8,
'dewpoint': 6,
'windchill': 6,
'windgust': 21,
'feelslike': 6,
'chanceofrain': 0,
'chanceofremdry': 89,
'chanceofwindy': 0,
'chanceofovercast': 88,
'chanceofsunshine': 15,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1},
{'time': '600',
'temperature': 7,
'wind_speed': 17,
'wind_degree': 239,
'wind_dir': 'WSW',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0,
'humidity': 90,
'visibility': 10,
'pressure': 1012,
'cloudcover': 100,
'heatindex': 7,
'dewpoint': 6,
'windchill': 4,
'windgust': 24,
'feelslike': 4,
'chanceofrain': 0,
'chanceofremdry': 84,
'chanceofwindy': 0,
'chanceofovercast': 90,
'chanceofsunshine': 15,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 2},
{'time': '900',
'temperature': 8,
'wind_speed': 21,
'wind_degree': 248,
'wind_dir': 'WSW',
'weather_code': 296,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0017_cloudy_with_light_rain.png'],
'weather_descriptions': ['Light rain'],
'precip': 0.5,
'humidity': 88,
'visibility': 10,
'pressure': 1012,
'cloudcover': 100,
'heatindex': 8,
'dewpoint': 6,
'windchill': 5,
'windgust': 27,
'feelslike': 5,
'chanceofrain': 28,
'chanceofremdry': 57,
'chanceofwindy': 0,
'chanceofovercast': 83,
'chanceofsunshine': 11,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 2},
{'time': '1200',
'temperature': 10,
'wind_speed': 24,
'wind_degree': 259,
'wind_dir': 'WSW',
'weather_code': 293,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0017_cloudy_with_light_rain.png'],
'weather_descriptions': ['Patchy light rain'],
'precip': 1.3,
'humidity': 71,
'visibility': 9,
'pressure': 1012,
'cloudcover': 85,
'heatindex': 10,
'dewpoint': 4,
'windchill': 7,
'windgust': 28,
'feelslike': 7,
'chanceofrain': 82,
'chanceofremdry': 0,
'chanceofwindy': 0,
'chanceofovercast': 87,
'chanceofsunshine': 0,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 2},
{'time': '1500',
'temperature': 12,
'wind_speed': 23,
'wind_degree': 273,
'wind_dir': 'W',
'weather_code': 176,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0009_light_rain_showers.png'],
'weather_descriptions': ['Patchy rain possible'],
'precip': 0.7,
'humidity': 49,
'visibility': 9,
'pressure': 1012,
'cloudcover': 66,
'heatindex': 12,
'dewpoint': 2,
'windchill': 10,
'windgust': 27,
'feelslike': 10,
'chanceofrain': 79,
'chanceofremdry': 0,
'chanceofwindy': 0,
'chanceofovercast': 89,
'chanceofsunshine': 0,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 3},
{'time': '1800',
'temperature': 11,
'wind_speed': 21,
'wind_degree': 277,
'wind_dir': 'W',
'weather_code': 116,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0002_sunny_intervals.png'],
'weather_descriptions': ['Partly cloudy'],
'precip': 0.1,
'humidity': 54,
'visibility': 9,
'pressure': 1011,
'cloudcover': 73,
'heatindex': 11,
'dewpoint': 2,
'windchill': 9,
'windgust': 26,
'feelslike': 9,
'chanceofrain': 56,
'chanceofremdry': 30,
'chanceofwindy': 0,
'chanceofovercast': 68,
'chanceofsunshine': 27,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 4},
{'time': '2100',
'temperature': 8,
'wind_speed': 17,
'wind_degree': 273,
'wind_dir': 'W',
'weather_code': 176,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0025_light_rain_showers_night.png'],
'weather_descriptions': ['Patchy rain possible'],
'precip': 0,
'humidity': 75,
'visibility': 10,
'pressure': 1013,
'cloudcover': 61,
'heatindex': 8,
'dewpoint': 3,
'windchill': 5,
'windgust': 24,
'feelslike': 5,
'chanceofrain': 22,
'chanceofremdry': 60,
'chanceofwindy': 0,
'chanceofovercast': 59,
'chanceofsunshine': 53,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1}]},
'2021-05-12': {'date': '2021-05-12',
'date_epoch': 1620777600,
'astro': {'sunrise': '05:27 AM',
'sunset': '08:15 PM',
'moonrise': '05:59 AM',
'moonset': '09:19 PM',
'moon_phase': 'Waxing Crescent',
'moon_illumination': 14},
'mintemp': 5,
'maxtemp': 15,
'avgtemp': 10,
'totalsnow': 0,
'sunhour': 11.4,
'uv_index': 4,
'hourly': [{'time': '0',
'temperature': 6,
'wind_speed': 16,
'wind_degree': 266,
'wind_dir': 'W',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0.1,
'humidity': 85,
'visibility': 10,
'pressure': 1013,
'cloudcover': 100,
'heatindex': 6,
'dewpoint': 4,
'windchill': 3,
'windgust': 21,
'feelslike': 3,
'chanceofrain': 44,
'chanceofremdry': 29,
'chanceofwindy': 0,
'chanceofovercast': 92,
'chanceofsunshine': 4,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1},
{'time': '300',
'temperature': 6,
'wind_speed': 13,
'wind_degree': 270,
'wind_dir': 'W',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0,
'humidity': 85,
'visibility': 10,
'pressure': 1013,
'cloudcover': 98,
'heatindex': 6,
'dewpoint': 4,
'windchill': 3,
'windgust': 18,
'feelslike': 3,
'chanceofrain': 0,
'chanceofremdry': 88,
'chanceofwindy': 0,
'chanceofovercast': 90,
'chanceofsunshine': 13,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1},
{'time': '600',
'temperature': 7,
'wind_speed': 11,
'wind_degree': 293,
'wind_dir': 'WNW',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0,
'humidity': 81,
'visibility': 10,
'pressure': 1016,
'cloudcover': 94,
'heatindex': 7,
'dewpoint': 3,
'windchill': 4,
'windgust': 16,
'feelslike': 4,
'chanceofrain': 0,
'chanceofremdry': 91,
'chanceofwindy': 0,
'chanceofovercast': 88,
'chanceofsunshine': 15,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 2},
{'time': '900',
'temperature': 10,
'wind_speed': 13,
'wind_degree': 324,
'wind_dir': 'NW',
'weather_code': 176,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0009_light_rain_showers.png'],
'weather_descriptions': ['Patchy rain possible'],
'precip': 0,
'humidity': 60,
'visibility': 10,
'pressure': 1018,
'cloudcover': 98,
'heatindex': 10,
'dewpoint': 3,
'windchill': 8,
'windgust': 15,
'feelslike': 8,
'chanceofrain': 23,
'chanceofremdry': 61,
'chanceofwindy': 0,
'chanceofovercast': 93,
'chanceofsunshine': 7,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 3},
{'time': '1200',
'temperature': 14,
'wind_speed': 14,
'wind_degree': 344,
'wind_dir': 'NNW',
'weather_code': 176,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0009_light_rain_showers.png'],
'weather_descriptions': ['Patchy rain possible'],
'precip': 0.1,
'humidity': 42,
'visibility': 10,
'pressure': 1018,
'cloudcover': 95,
'heatindex': 14,
'dewpoint': 1,
'windchill': 13,
'windgust': 16,
'feelslike': 13,
'chanceofrain': 66,
'chanceofremdry': 0,
'chanceofwindy': 0,
'chanceofovercast': 90,
'chanceofsunshine': 0,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 3},
{'time': '1500',
'temperature': 15,
'wind_speed': 10,
'wind_degree': 332,
'wind_dir': 'NNW',
'weather_code': 116,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0002_sunny_intervals.png'],
'weather_descriptions': ['Partly cloudy'],
'precip': 0.1,
'humidity': 39,
'visibility': 10,
'pressure': 1018,
'cloudcover': 72,
'heatindex': 15,
'dewpoint': 1,
'windchill': 14,
'windgust': 12,
'feelslike': 14,
'chanceofrain': 41,
'chanceofremdry': 28,
'chanceofwindy': 0,
'chanceofovercast': 72,
'chanceofsunshine': 23,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 4},
{'time': '1800',
'temperature': 14,
'wind_speed': 6,
'wind_degree': 271,
'wind_dir': 'W',
'weather_code': 116,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0002_sunny_intervals.png'],
'weather_descriptions': ['Partly cloudy'],
'precip': 0,
'humidity': 44,
'visibility': 10,
'pressure': 1019,
'cloudcover': 44,
'heatindex': 14,
'dewpoint': 2,
'windchill': 14,
'windgust': 9,
'feelslike': 14,
'chanceofrain': 0,
'chanceofremdry': 85,
'chanceofwindy': 0,
'chanceofovercast': 37,
'chanceofsunshine': 75,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 4},
{'time': '2100',
'temperature': 12,
'wind_speed': 6,
'wind_degree': 239,
'wind_dir': 'WSW',
'weather_code': 116,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Partly cloudy'],
'precip': 0,
'humidity': 56,
'visibility': 10,
'pressure': 1020,
'cloudcover': 41,
'heatindex': 12,
'dewpoint': 3,
'windchill': 12,
'windgust': 10,
'feelslike': 12,
'chanceofrain': 0,
'chanceofremdry': 84,
'chanceofwindy': 0,
'chanceofovercast': 37,
'chanceofsunshine': 82,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1}]}}}
如何遍历此输出并创建如下所示的新数据框：
（并且仅获取日期时间小时和降雨值）
Date
precip at time 0
precip at time 300
...
2021-05-11
0.1
0
...
2021-05-12
0.1
0
...
...
...
...
...
此外，我想将日期列转换为月日，年。 IE。 2021-05-11 -> 2021 年 5 月 5 日。我尝试使用
df['Date'] = datetime.datetime.strftime('%b %d,%Y')
然后
df['Date'] = pandas.to_datetime(df['Date'])
但是我得到这个错误：
AttributeError: type object 'datetime.datetime' has no attribute 'datetime'
创建数据框
这将创建一个包含所需数据和列名称的数据框。
import pandas as pd
### code to get data
forecast={}
for date in api_response['forecast']:
precip = {f"precip at time {api_response['forecast'][date]['hourly'][hour]['time']}":
api_response['forecast'][date]['hourly'][hour]['precip'] for hour in range(0, 8)}
forecast[date] = precip
df = pd.DataFrame.from_dict(forecast, orient='index', dtype=float).reset_index()
df.rename(columns={'index':'Date'}, inplace=True)
print(df)
创建数据框和格式 headers
如果您想要 HH:MM 格式的时间，请将这些 changes/additions 添加到代码中。
import json
import pandas as pd
### code to get data
forecast={}
for date in api_response['forecast']:
precip = {api_response['forecast'][date]['hourly'][hour]['time']:
api_response['forecast'][date]['hourly'][hour]['precip'] for hour in range(0, 8)}
forecast[date] = precip
df = pd.DataFrame.from_dict(forecast, orient='index', dtype=float).reset_index()
cols = ['Date' if col=='index' else f'precip at time {col.zfill(4)[:2]+":"+col.zfill(4)[2:]}' for col in df.columns]
df.columns = cols
print(df)
更改日期列格式
要更改 Date 列的格式，我们首先需要将其转换为 datetime，我们可以使用 pd.to_datetime.
然后我们可以链接 strftime 以获得所需的格式，May 05, 2021。
有关可与 strftime 一起使用的指令的完整列表，请参阅 here。
df['Date'] = pd.to_datetime(df['Date']).dt.strftime('%B %d, %Y')
我正在从 weatherstack API 获取天气预报数据。
params = {
'access_key': 'enter_key_here',
'query': 'Montreal',
'forecast_days': '2', #two days forecast
'hourly': '1' #API to return weather data split hourly
}
api_result = requests.get('https://api.weatherstack.com/forecast', params)
api_response = api_result.json()
api_response
输出如下所示：
{'request': {'type': 'City',
'query': 'Montreal, Canada',
'language': 'en',
'unit': 'm'},
'location': {'name': 'Montreal',
'country': 'Canada',
'region': 'Quebec',
'lat': '45.500',
'lon': '-73.583',
'timezone_id': 'America/Toronto',
'localtime': '2021-05-11 13:08',
'localtime_epoch': 1620738480,
'utc_offset': '-4.0'},
'current': {'observation_time': '05:08 PM',
'temperature': 11,
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'wind_speed': 31,
'wind_degree': 230,
'wind_dir': 'SW',
'pressure': 1012,
'precip': 1,
'humidity': 58,
'cloudcover': 100,
'feelslike': 8,
'uv_index': 2,
'visibility': 14,
'is_day': 'yes'},
'forecast': {'2021-05-11': {'date': '2021-05-11',
'date_epoch': 1620691200,
'astro': {'sunrise': '05:28 AM',
'sunset': '08:14 PM',
'moonrise': '05:35 AM',
'moonset': '08:14 PM',
'moon_phase': 'Waxing Crescent',
'moon_illumination': 7},
'mintemp': 6,
'maxtemp': 13,
'avgtemp': 8,
'totalsnow': 0,
'sunhour': 12.4,
'uv_index': 6,
'hourly': [{'time': '0',
'temperature': 9,
'wind_speed': 16,
'wind_degree': 240,
'wind_dir': 'WSW',
'weather_code': 119,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0003_white_cloud.png'],
'weather_descriptions': ['Cloudy'],
'precip': 0.1,
'humidity': 74,
'visibility': 10,
'pressure': 1012,
'cloudcover': 75,
'heatindex': 9,
'dewpoint': 5,
'windchill': 7,
'windgust': 23,
'feelslike': 7,
'chanceofrain': 43,
'chanceofremdry': 31,
'chanceofwindy': 0,
'chanceofovercast': 86,
'chanceofsunshine': 5,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1},
{'time': '300',
'temperature': 8,
'wind_speed': 15,
'wind_degree': 247,
'wind_dir': 'WSW',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0,
'humidity': 83,
'visibility': 10,
'pressure': 1012,
'cloudcover': 88,
'heatindex': 8,
'dewpoint': 6,
'windchill': 6,
'windgust': 21,
'feelslike': 6,
'chanceofrain': 0,
'chanceofremdry': 89,
'chanceofwindy': 0,
'chanceofovercast': 88,
'chanceofsunshine': 15,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1},
{'time': '600',
'temperature': 7,
'wind_speed': 17,
'wind_degree': 239,
'wind_dir': 'WSW',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0,
'humidity': 90,
'visibility': 10,
'pressure': 1012,
'cloudcover': 100,
'heatindex': 7,
'dewpoint': 6,
'windchill': 4,
'windgust': 24,
'feelslike': 4,
'chanceofrain': 0,
'chanceofremdry': 84,
'chanceofwindy': 0,
'chanceofovercast': 90,
'chanceofsunshine': 15,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 2},
{'time': '900',
'temperature': 8,
'wind_speed': 21,
'wind_degree': 248,
'wind_dir': 'WSW',
'weather_code': 296,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0017_cloudy_with_light_rain.png'],
'weather_descriptions': ['Light rain'],
'precip': 0.5,
'humidity': 88,
'visibility': 10,
'pressure': 1012,
'cloudcover': 100,
'heatindex': 8,
'dewpoint': 6,
'windchill': 5,
'windgust': 27,
'feelslike': 5,
'chanceofrain': 28,
'chanceofremdry': 57,
'chanceofwindy': 0,
'chanceofovercast': 83,
'chanceofsunshine': 11,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 2},
{'time': '1200',
'temperature': 10,
'wind_speed': 24,
'wind_degree': 259,
'wind_dir': 'WSW',
'weather_code': 293,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0017_cloudy_with_light_rain.png'],
'weather_descriptions': ['Patchy light rain'],
'precip': 1.3,
'humidity': 71,
'visibility': 9,
'pressure': 1012,
'cloudcover': 85,
'heatindex': 10,
'dewpoint': 4,
'windchill': 7,
'windgust': 28,
'feelslike': 7,
'chanceofrain': 82,
'chanceofremdry': 0,
'chanceofwindy': 0,
'chanceofovercast': 87,
'chanceofsunshine': 0,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 2},
{'time': '1500',
'temperature': 12,
'wind_speed': 23,
'wind_degree': 273,
'wind_dir': 'W',
'weather_code': 176,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0009_light_rain_showers.png'],
'weather_descriptions': ['Patchy rain possible'],
'precip': 0.7,
'humidity': 49,
'visibility': 9,
'pressure': 1012,
'cloudcover': 66,
'heatindex': 12,
'dewpoint': 2,
'windchill': 10,
'windgust': 27,
'feelslike': 10,
'chanceofrain': 79,
'chanceofremdry': 0,
'chanceofwindy': 0,
'chanceofovercast': 89,
'chanceofsunshine': 0,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 3},
{'time': '1800',
'temperature': 11,
'wind_speed': 21,
'wind_degree': 277,
'wind_dir': 'W',
'weather_code': 116,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0002_sunny_intervals.png'],
'weather_descriptions': ['Partly cloudy'],
'precip': 0.1,
'humidity': 54,
'visibility': 9,
'pressure': 1011,
'cloudcover': 73,
'heatindex': 11,
'dewpoint': 2,
'windchill': 9,
'windgust': 26,
'feelslike': 9,
'chanceofrain': 56,
'chanceofremdry': 30,
'chanceofwindy': 0,
'chanceofovercast': 68,
'chanceofsunshine': 27,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 4},
{'time': '2100',
'temperature': 8,
'wind_speed': 17,
'wind_degree': 273,
'wind_dir': 'W',
'weather_code': 176,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0025_light_rain_showers_night.png'],
'weather_descriptions': ['Patchy rain possible'],
'precip': 0,
'humidity': 75,
'visibility': 10,
'pressure': 1013,
'cloudcover': 61,
'heatindex': 8,
'dewpoint': 3,
'windchill': 5,
'windgust': 24,
'feelslike': 5,
'chanceofrain': 22,
'chanceofremdry': 60,
'chanceofwindy': 0,
'chanceofovercast': 59,
'chanceofsunshine': 53,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1}]},
'2021-05-12': {'date': '2021-05-12',
'date_epoch': 1620777600,
'astro': {'sunrise': '05:27 AM',
'sunset': '08:15 PM',
'moonrise': '05:59 AM',
'moonset': '09:19 PM',
'moon_phase': 'Waxing Crescent',
'moon_illumination': 14},
'mintemp': 5,
'maxtemp': 15,
'avgtemp': 10,
'totalsnow': 0,
'sunhour': 11.4,
'uv_index': 4,
'hourly': [{'time': '0',
'temperature': 6,
'wind_speed': 16,
'wind_degree': 266,
'wind_dir': 'W',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0.1,
'humidity': 85,
'visibility': 10,
'pressure': 1013,
'cloudcover': 100,
'heatindex': 6,
'dewpoint': 4,
'windchill': 3,
'windgust': 21,
'feelslike': 3,
'chanceofrain': 44,
'chanceofremdry': 29,
'chanceofwindy': 0,
'chanceofovercast': 92,
'chanceofsunshine': 4,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1},
{'time': '300',
'temperature': 6,
'wind_speed': 13,
'wind_degree': 270,
'wind_dir': 'W',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0,
'humidity': 85,
'visibility': 10,
'pressure': 1013,
'cloudcover': 98,
'heatindex': 6,
'dewpoint': 4,
'windchill': 3,
'windgust': 18,
'feelslike': 3,
'chanceofrain': 0,
'chanceofremdry': 88,
'chanceofwindy': 0,
'chanceofovercast': 90,
'chanceofsunshine': 13,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1},
{'time': '600',
'temperature': 7,
'wind_speed': 11,
'wind_degree': 293,
'wind_dir': 'WNW',
'weather_code': 122,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Overcast'],
'precip': 0,
'humidity': 81,
'visibility': 10,
'pressure': 1016,
'cloudcover': 94,
'heatindex': 7,
'dewpoint': 3,
'windchill': 4,
'windgust': 16,
'feelslike': 4,
'chanceofrain': 0,
'chanceofremdry': 91,
'chanceofwindy': 0,
'chanceofovercast': 88,
'chanceofsunshine': 15,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 2},
{'time': '900',
'temperature': 10,
'wind_speed': 13,
'wind_degree': 324,
'wind_dir': 'NW',
'weather_code': 176,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0009_light_rain_showers.png'],
'weather_descriptions': ['Patchy rain possible'],
'precip': 0,
'humidity': 60,
'visibility': 10,
'pressure': 1018,
'cloudcover': 98,
'heatindex': 10,
'dewpoint': 3,
'windchill': 8,
'windgust': 15,
'feelslike': 8,
'chanceofrain': 23,
'chanceofremdry': 61,
'chanceofwindy': 0,
'chanceofovercast': 93,
'chanceofsunshine': 7,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 3},
{'time': '1200',
'temperature': 14,
'wind_speed': 14,
'wind_degree': 344,
'wind_dir': 'NNW',
'weather_code': 176,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0009_light_rain_showers.png'],
'weather_descriptions': ['Patchy rain possible'],
'precip': 0.1,
'humidity': 42,
'visibility': 10,
'pressure': 1018,
'cloudcover': 95,
'heatindex': 14,
'dewpoint': 1,
'windchill': 13,
'windgust': 16,
'feelslike': 13,
'chanceofrain': 66,
'chanceofremdry': 0,
'chanceofwindy': 0,
'chanceofovercast': 90,
'chanceofsunshine': 0,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 3},
{'time': '1500',
'temperature': 15,
'wind_speed': 10,
'wind_degree': 332,
'wind_dir': 'NNW',
'weather_code': 116,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0002_sunny_intervals.png'],
'weather_descriptions': ['Partly cloudy'],
'precip': 0.1,
'humidity': 39,
'visibility': 10,
'pressure': 1018,
'cloudcover': 72,
'heatindex': 15,
'dewpoint': 1,
'windchill': 14,
'windgust': 12,
'feelslike': 14,
'chanceofrain': 41,
'chanceofremdry': 28,
'chanceofwindy': 0,
'chanceofovercast': 72,
'chanceofsunshine': 23,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 4},
{'time': '1800',
'temperature': 14,
'wind_speed': 6,
'wind_degree': 271,
'wind_dir': 'W',
'weather_code': 116,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0002_sunny_intervals.png'],
'weather_descriptions': ['Partly cloudy'],
'precip': 0,
'humidity': 44,
'visibility': 10,
'pressure': 1019,
'cloudcover': 44,
'heatindex': 14,
'dewpoint': 2,
'windchill': 14,
'windgust': 9,
'feelslike': 14,
'chanceofrain': 0,
'chanceofremdry': 85,
'chanceofwindy': 0,
'chanceofovercast': 37,
'chanceofsunshine': 75,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 4},
{'time': '2100',
'temperature': 12,
'wind_speed': 6,
'wind_degree': 239,
'wind_dir': 'WSW',
'weather_code': 116,
'weather_icons': ['https://assets.weatherstack.com/images/wsymbols01_png_64/wsymbol_0004_black_low_cloud.png'],
'weather_descriptions': ['Partly cloudy'],
'precip': 0,
'humidity': 56,
'visibility': 10,
'pressure': 1020,
'cloudcover': 41,
'heatindex': 12,
'dewpoint': 3,
'windchill': 12,
'windgust': 10,
'feelslike': 12,
'chanceofrain': 0,
'chanceofremdry': 84,
'chanceofwindy': 0,
'chanceofovercast': 37,
'chanceofsunshine': 82,
'chanceoffrost': 0,
'chanceofhightemp': 0,
'chanceoffog': 0,
'chanceofsnow': 0,
'chanceofthunder': 0,
'uv_index': 1}]}}}
如何遍历此输出并创建如下所示的新数据框： （并且仅获取日期时间小时和降雨值）
| Date | precip at time 0 | precip at time 300 | ... |
|---|---|---|---|
| 2021-05-11 | 0.1 | 0 | ... |
| 2021-05-12 | 0.1 | 0 | ... |
| ... | ... | ... | ... |
此外，我想将日期列转换为月日，年。 IE。 2021-05-11 -> 2021 年 5 月 5 日。我尝试使用
df['Date'] = datetime.datetime.strftime('%b %d,%Y')
然后
df['Date'] = pandas.to_datetime(df['Date'])
但是我得到这个错误：
AttributeError: type object 'datetime.datetime' has no attribute 'datetime'
创建数据框
这将创建一个包含所需数据和列名称的数据框。
import pandas as pd
### code to get data
forecast={}
for date in api_response['forecast']:
precip = {f"precip at time {api_response['forecast'][date]['hourly'][hour]['time']}":
api_response['forecast'][date]['hourly'][hour]['precip'] for hour in range(0, 8)}
forecast[date] = precip
df = pd.DataFrame.from_dict(forecast, orient='index', dtype=float).reset_index()
df.rename(columns={'index':'Date'}, inplace=True)
print(df)
创建数据框和格式 headers
如果您想要 HH:MM 格式的时间，请将这些 changes/additions 添加到代码中。
import json
import pandas as pd
### code to get data
forecast={}
for date in api_response['forecast']:
precip = {api_response['forecast'][date]['hourly'][hour]['time']:
api_response['forecast'][date]['hourly'][hour]['precip'] for hour in range(0, 8)}
forecast[date] = precip
df = pd.DataFrame.from_dict(forecast, orient='index', dtype=float).reset_index()
cols = ['Date' if col=='index' else f'precip at time {col.zfill(4)[:2]+":"+col.zfill(4)[2:]}' for col in df.columns]
df.columns = cols
print(df)
更改日期列格式
要更改 Date 列的格式，我们首先需要将其转换为 datetime，我们可以使用 pd.to_datetime.
然后我们可以链接 strftime 以获得所需的格式，May 05, 2021。
有关可与 strftime 一起使用的指令的完整列表，请参阅 here。
df['Date'] = pd.to_datetime(df['Date']).dt.strftime('%B %d, %Y')