递归字典遍历 python
Recursive dictionary walking in python
我是 python 的新手，正在尝试创建一个递归字典遍历器，输出字典中每个项目的路径。
下面是我的代码，包括一些示例数据。目标是从 weather underground 导入天气数据并发布到 raspberry pi 上的 mqtt 主题。 （mqtt 代码都运行良好并且独立于此，为此我只需要生成路径）
我遇到的问题是，当我到达字典的 'forecastday' 元素时，我的函数返回看起来像 json 的数据，而不是进一步递归到路径中。
我已经尝试了一些遍历字典的方法，但是当示例开始进入 'generators' 等时，事情开始有点超出我的理解范围了。
（测试数据不包含任何隐私信息，是离我最近的城镇的一般天气预报）
谢谢
import json
def print_path(root, data, path):
for element in data.keys():
if not isinstance(data[element], dict):
print root + path + element, data[element]
else:
print_path(root, data[element], element+"/")
json_string = u'{"response":{"version":"0.1","termsofService":"http://www.wunderground.com/weather/api/d/terms.html","features":{"almanac":1,"astronomy":1,"conditions":1,"forecast":1}},"current_observation":{"image":{"url":"http://icons.wxug.com/graphics/wu2/logo_130x80.png","title":"Weather Underground","link":"http://www.wunderground.com"},"display_location":{"full":"Llanelli, United Kingdom","city":"Llanelli","state":"","state_name":"United Kingdom","country":"UK","country_iso3166":"GB","zip":"00000","magic":"11","wmo":"03605","latitude":"51.67610931","longitude":"-4.15666723","elevation":"17.00000000"},"observation_location":{"full":"Llanelli, CARMARTHENSHIRE","city":"Llanelli","state":"CARMARTHENSHIRE","country":"GB","country_iso3166":"GB","latitude":"51.679951","longitude":"-4.140789","elevation":"40 ft"},"estimated":{},"station_id":"ICARMART4","observation_time":"Last Updated on October 18, 8:07 AM BST","observation_time_rfc822":"Tue, 18 Oct 2016 08:07:38 +0100","observation_epoch":"1476774458","local_time_rfc822":"Tue, 18 Oct 2016 08:07:44 +0100","local_epoch":"1476774464","local_tz_short":"BST","local_tz_long":"Europe/London","local_tz_offset":"+0100","weather":"Mostly Cloudy","temperature_string":"49.0 F (9.4 C)","temp_f":49.0,"temp_c":9.4,"relative_humidity":"90%","wind_string":"From the West at 4.5 MPH Gusting to 6.9 MPH","wind_dir":"West","wind_degrees":272,"wind_mph":4.5,"wind_gust_mph":"6.9","wind_kph":7.2,"wind_gust_kph":"11.1","pressure_mb":"1019","pressure_in":"30.09","pressure_trend":"0","dewpoint_string":"46 F (8 C)","dewpoint_f":46,"dewpoint_c":8,"heat_index_string":"NA","heat_index_f":"NA","heat_index_c":"NA","windchill_string":"47 F (9 C)","windchill_f":"47","windchill_c":"9","feelslike_string":"47 F (9 C)","feelslike_f":"47","feelslike_c":"9","visibility_mi":"6.2","visibility_km":"10.0","solarradiation":"--","UV":"0","precip_1hr_string":"0.00 in ( 0 mm)","precip_1hr_in":"0.00","precip_1hr_metric":" 0","precip_today_string":"0.07 in (2 mm)","precip_today_in":"0.07","precip_today_metric":"2","soil_moisture":"255.0","icon":"mostlycloudy","icon_url":"http://icons.wxug.com/i/c/k/mostlycloudy.gif","forecast_url":"http://www.wunderground.com/global/stations/03605.html","history_url":"http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=ICARMART4","ob_url":"http://www.wunderground.com/cgi-bin/findweather/getForecast?query=51.679951,-4.140789","nowcast":""},"forecast":{"txt_forecast":{"date":"7:03 AM BST","forecastday":[{"period":0,"icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","title":"Tuesday","fcttext":"Sun and clouds mixed. High around 55F. Winds WNW at 10 to 20 mph.","fcttext_metric":"Sun and clouds mixed. High 12C. Winds WNW at 15 to 30 km/h.","pop":"0"},{"period":1,"icon":"nt_partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/nt_partlycloudy.gif","title":"Tuesday Night","fcttext":"Partly cloudy skies. Low 43F. Winds WNW at 5 to 10 mph.","fcttext_metric":"Partly cloudy. Low 6C. Winds WNW at 10 to 15 km/h.","pop":"10"},{"period":2,"icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","title":"Wednesday","fcttext":"Partly cloudy skies in the morning will give way to cloudy skies during the afternoon. High 56F. Winds NW at 10 to 15 mph.","fcttext_metric":"Partly to mostly cloudy. High 13C. Winds NW at 15 to 25 km/h.","pop":"10"},{"period":3,"icon":"nt_partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/nt_partlycloudy.gif","title":"Wednesday Night","fcttext":"A few clouds. Low 41F. Winds N at 5 to 10 mph.","fcttext_metric":"Partly cloudy. Low around 5C. Winds N at 10 to 15 km/h.","pop":"10"},{"period":4,"icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","title":"Thursday","fcttext":"Intervals of clouds and sunshine. High 59F. Winds N at 5 to 10 mph.","fcttext_metric":"Partly cloudy skies. High around 15C. Winds N at 10 to 15 km/h.","pop":"10"},{"period":5,"icon":"nt_partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/nt_partlycloudy.gif","title":"Thursday Night","fcttext":"Partly cloudy. Low 41F. Winds NE at 5 to 10 mph.","fcttext_metric":"Partly cloudy. Low near 5C. Winds NE at 10 to 15 km/h.","pop":"10"},{"period":6,"icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","title":"Friday","fcttext":"Intervals of clouds and sunshine. High 58F. Winds E at 5 to 10 mph.","fcttext_metric":"Sunshine and clouds mixed. High 14C. Winds E at 10 to 15 km/h.","pop":"10"},{"period":7,"icon":"nt_partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/nt_partlycloudy.gif","title":"Friday Night","fcttext":"Partly cloudy. Low 44F. Winds E at 5 to 10 mph.","fcttext_metric":"Partly cloudy. Low 6C. Winds E at 10 to 15 km/h.","pop":"10"}]},"simpleforecast":{"forecastday":[{"date":{"epoch":"1476813600","pretty":"7:00 PM BST on October 18, 2016","day":18,"month":10,"year":2016,"yday":291,"hour":19,"min":"00","sec":0,"isdst":"1","monthname":"October","monthname_short":"Oct","weekday_short":"Tue","weekday":"Tuesday","ampm":"PM","tz_short":"BST","tz_long":"Europe/London"},"period":1,"high":{"fahrenheit":"55","celsius":"13"},"low":{"fahrenheit":"43","celsius":"6"},"conditions":"Partly Cloudy","icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","skyicon":"","pop":0,"qpf_allday":{"in":0.00,"mm":0},"qpf_day":{"in":0.00,"mm":0},"qpf_night":{"in":0.00,"mm":0},"snow_allday":{"in":0.0,"cm":0.0},"snow_day":{"in":0.0,"cm":0.0},"snow_night":{"in":0.0,"cm":0.0},"maxwind":{"mph":20,"kph":32,"dir":"WNW","degrees":293},"avewind":{"mph":16,"kph":26,"dir":"WNW","degrees":293},"avehumidity":71,"maxhumidity":0,"minhumidity":0},{"date":{"epoch":"1476900000","pretty":"7:00 PM BST on October 19, 2016","day":19,"month":10,"year":2016,"yday":292,"hour":19,"min":"00","sec":0,"isdst":"1","monthname":"October","monthname_short":"Oct","weekday_short":"Wed","weekday":"Wednesday","ampm":"PM","tz_short":"BST","tz_long":"Europe/London"},"period":2,"high":{"fahrenheit":"56","celsius":"13"},"low":{"fahrenheit":"41","celsius":"5"},"conditions":"Partly Cloudy","icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","skyicon":"","pop":10,"qpf_allday":{"in":0.00,"mm":0},"qpf_day":{"in":0.00,"mm":0},"qpf_night":{"in":0.00,"mm":0},"snow_allday":{"in":0.0,"cm":0.0},"snow_day":{"in":0.0,"cm":0.0},"snow_night":{"in":0.0,"cm":0.0},"maxwind":{"mph":15,"kph":24,"dir":"NW","degrees":318},"avewind":{"mph":12,"kph":19,"dir":"NW","degrees":318},"avehumidity":79,"maxhumidity":0,"minhumidity":0},{"date":{"epoch":"1476986400","pretty":"7:00 PM BST on October 20, 2016","day":20,"month":10,"year":2016,"yday":293,"hour":19,"min":"00","sec":0,"isdst":"1","monthname":"October","monthname_short":"Oct","weekday_short":"Thu","weekday":"Thursday","ampm":"PM","tz_short":"BST","tz_long":"Europe/London"},"period":3,"high":{"fahrenheit":"59","celsius":"15"},"low":{"fahrenheit":"41","celsius":"5"},"conditions":"Partly Cloudy","icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","skyicon":"","pop":10,"qpf_allday":{"in":0.00,"mm":0},"qpf_day":{"in":0.00,"mm":0},"qpf_night":{"in":0.00,"mm":0},"snow_allday":{"in":0.0,"cm":0.0},"snow_day":{"in":0.0,"cm":0.0},"snow_night":{"in":0.0,"cm":0.0},"maxwind":{"mph":10,"kph":16,"dir":"N","degrees":2},"avewind":{"mph":7,"kph":11,"dir":"N","degrees":2},"avehumidity":78,"maxhumidity":0,"minhumidity":0},{"date":{"epoch":"1477072800","pretty":"7:00 PM BST on October 21, 2016","day":21,"month":10,"year":2016,"yday":294,"hour":19,"min":"00","sec":0,"isdst":"1","monthname":"October","monthname_short":"Oct","weekday_short":"Fri","weekday":"Friday","ampm":"PM","tz_short":"BST","tz_long":"Europe/London"},"period":4,"high":{"fahrenheit":"58","celsius":"14"},"low":{"fahrenheit":"44","celsius":"7"},"conditions":"Partly Cloudy","icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","skyicon":"","pop":10,"qpf_allday":{"in":0.00,"mm":0},"qpf_day":{"in":0.00,"mm":0},"qpf_night":{"in":0.00,"mm":0},"snow_allday":{"in":0.0,"cm":0.0},"snow_day":{"in":0.0,"cm":0.0},"snow_night":{"in":0.0,"cm":0.0},"maxwind":{"mph":10,"kph":16,"dir":"E","degrees":91},"avewind":{"mph":7,"kph":11,"dir":"E","degrees":91},"avehumidity":79,"maxhumidity":0,"minhumidity":0}]}},"moon_phase":{"percentIlluminated":"93","ageOfMoon":"17","phaseofMoon":"Waning Gibbous","hemisphere":"North","current_time":{"hour":"8","minute":"07"},"sunrise":{"hour":"7","minute":"46"},"sunset":{"hour":"18","minute":"15"},"moonrise":{"hour":"20","minute":"10"},"moonset":{"hour":"10","minute":"24"}},"sun_phase":{"sunrise":{"hour":"7","minute":"46"},"sunset":{"hour":"18","minute":"15"}},"almanac":{"airport_code":"EGFF","temp_high":{"normal":{"F":"55","C":"12"},"record":{"F":"66","C":"18"},"recordyear":"1997"},"temp_low":{"normal":{"F":"46","C":"7"},"record":{"F":"33","C":"0"},"recordyear":"1998"}}}'
weather_report = json.loads(json_string)
print_path("dev/blah/weather/", weather_report, "")
编辑>>
这是我从脚本中得到的一些输出
...
dev/blah/weather/sunrise/minute 46
dev/blah/weather/sunrise/hour 7
dev/blah/weather/sunset/minute 15
dev/blah/weather/sunset/hour 18
dev/blah/weather/sunrise/minute 46
dev/blah/weather/sunrise/hour 7
dev/blah/weather/txt_forecast/date 7:03 AM BST
dev/blah/weather/txt_forecast/forecastday [{u'title': u'Tuesday', u'icon_url': u'http://icons.wxug.com/i/c/k/partlycloudy.gif', u'fcttext_metric': u'Sun and clouds mixed. High 12C. Winds WNW at 15 to 30 km/h.', u'period': 0, u'pop': u'0', u'fcttext': u'Sun and clouds mixed. High around 55F. Winds WNW at 10 to 20 mph.', u'icon': u'partlycloudy'}, {u'title': u'Tuesday Night', u'icon_url': u'http://icons.wxug.com/i/c/k/nt_partlycloudy.gif', u'fcttext_metric': u'Partly cloudy. Low 6C. Winds WNW at 10 to 15 km/h.', u'period': 1, u'pop': u'10', u'fcttext': u'Partly cloudy skies. Low 43F. Winds WNW at 5 to 10 mph.', u'icon': u'nt_partlycloudy'}, {u'title': u'Wednesday', u'icon_url': u'http://icons.wxug.com/i/c/k/partlycloudy.gif', u'fcttext_metric': u'Partly to mostly cloudy. High 13C. Winds NW at 15 to 25 km/h.', u'period': 2, u'pop': u'10', u'fcttext': u'Partly cloudy skies in the morning will give way to cloudy skies during the afternoon.
这里的最后一个条目应该是
dev/blah/weather/txt_forecast/forecastday/0/title Tuesday
dev/blah/weather/txt_forecast/forecastday/0/icon partlycloudy
而是显示
[{u'title': u'Tuesday', u'icon_url': u'http://icons.wxug.com/i/c/k/partlycloudy.gif', u'fcttext_metric': u'Sun and clouds mixed. High 12C. Winds WNW at 15 to 30 km/h.', u'perio...
只需将常规 for 循环混入该递归中以迭代列表。
def print_path(root, data, path):
for element, val in data.items():
if isinstance(val, dict):
print_path(root, val, element+"/")
elif isinstance(val, list):
list_path = path+element+"/"
for i, item in enumerate(val):
print_path(root, item, list_path+str(i)+"/")
else:
print root + path + element, val
应该在输出中看到 dev/blah/weather/txt_forecast/forecastday/0/title Tuesday
我是 python 的新手，正在尝试创建一个递归字典遍历器，输出字典中每个项目的路径。
下面是我的代码，包括一些示例数据。目标是从 weather underground 导入天气数据并发布到 raspberry pi 上的 mqtt 主题。 （mqtt 代码都运行良好并且独立于此，为此我只需要生成路径）
我遇到的问题是，当我到达字典的 'forecastday' 元素时，我的函数返回看起来像 json 的数据，而不是进一步递归到路径中。
我已经尝试了一些遍历字典的方法，但是当示例开始进入 'generators' 等时，事情开始有点超出我的理解范围了。
（测试数据不包含任何隐私信息，是离我最近的城镇的一般天气预报）
谢谢
import json
def print_path(root, data, path):
for element in data.keys():
if not isinstance(data[element], dict):
print root + path + element, data[element]
else:
print_path(root, data[element], element+"/")
json_string = u'{"response":{"version":"0.1","termsofService":"http://www.wunderground.com/weather/api/d/terms.html","features":{"almanac":1,"astronomy":1,"conditions":1,"forecast":1}},"current_observation":{"image":{"url":"http://icons.wxug.com/graphics/wu2/logo_130x80.png","title":"Weather Underground","link":"http://www.wunderground.com"},"display_location":{"full":"Llanelli, United Kingdom","city":"Llanelli","state":"","state_name":"United Kingdom","country":"UK","country_iso3166":"GB","zip":"00000","magic":"11","wmo":"03605","latitude":"51.67610931","longitude":"-4.15666723","elevation":"17.00000000"},"observation_location":{"full":"Llanelli, CARMARTHENSHIRE","city":"Llanelli","state":"CARMARTHENSHIRE","country":"GB","country_iso3166":"GB","latitude":"51.679951","longitude":"-4.140789","elevation":"40 ft"},"estimated":{},"station_id":"ICARMART4","observation_time":"Last Updated on October 18, 8:07 AM BST","observation_time_rfc822":"Tue, 18 Oct 2016 08:07:38 +0100","observation_epoch":"1476774458","local_time_rfc822":"Tue, 18 Oct 2016 08:07:44 +0100","local_epoch":"1476774464","local_tz_short":"BST","local_tz_long":"Europe/London","local_tz_offset":"+0100","weather":"Mostly Cloudy","temperature_string":"49.0 F (9.4 C)","temp_f":49.0,"temp_c":9.4,"relative_humidity":"90%","wind_string":"From the West at 4.5 MPH Gusting to 6.9 MPH","wind_dir":"West","wind_degrees":272,"wind_mph":4.5,"wind_gust_mph":"6.9","wind_kph":7.2,"wind_gust_kph":"11.1","pressure_mb":"1019","pressure_in":"30.09","pressure_trend":"0","dewpoint_string":"46 F (8 C)","dewpoint_f":46,"dewpoint_c":8,"heat_index_string":"NA","heat_index_f":"NA","heat_index_c":"NA","windchill_string":"47 F (9 C)","windchill_f":"47","windchill_c":"9","feelslike_string":"47 F (9 C)","feelslike_f":"47","feelslike_c":"9","visibility_mi":"6.2","visibility_km":"10.0","solarradiation":"--","UV":"0","precip_1hr_string":"0.00 in ( 0 mm)","precip_1hr_in":"0.00","precip_1hr_metric":" 0","precip_today_string":"0.07 in (2 mm)","precip_today_in":"0.07","precip_today_metric":"2","soil_moisture":"255.0","icon":"mostlycloudy","icon_url":"http://icons.wxug.com/i/c/k/mostlycloudy.gif","forecast_url":"http://www.wunderground.com/global/stations/03605.html","history_url":"http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=ICARMART4","ob_url":"http://www.wunderground.com/cgi-bin/findweather/getForecast?query=51.679951,-4.140789","nowcast":""},"forecast":{"txt_forecast":{"date":"7:03 AM BST","forecastday":[{"period":0,"icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","title":"Tuesday","fcttext":"Sun and clouds mixed. High around 55F. Winds WNW at 10 to 20 mph.","fcttext_metric":"Sun and clouds mixed. High 12C. Winds WNW at 15 to 30 km/h.","pop":"0"},{"period":1,"icon":"nt_partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/nt_partlycloudy.gif","title":"Tuesday Night","fcttext":"Partly cloudy skies. Low 43F. Winds WNW at 5 to 10 mph.","fcttext_metric":"Partly cloudy. Low 6C. Winds WNW at 10 to 15 km/h.","pop":"10"},{"period":2,"icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","title":"Wednesday","fcttext":"Partly cloudy skies in the morning will give way to cloudy skies during the afternoon. High 56F. Winds NW at 10 to 15 mph.","fcttext_metric":"Partly to mostly cloudy. High 13C. Winds NW at 15 to 25 km/h.","pop":"10"},{"period":3,"icon":"nt_partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/nt_partlycloudy.gif","title":"Wednesday Night","fcttext":"A few clouds. Low 41F. Winds N at 5 to 10 mph.","fcttext_metric":"Partly cloudy. Low around 5C. Winds N at 10 to 15 km/h.","pop":"10"},{"period":4,"icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","title":"Thursday","fcttext":"Intervals of clouds and sunshine. High 59F. Winds N at 5 to 10 mph.","fcttext_metric":"Partly cloudy skies. High around 15C. Winds N at 10 to 15 km/h.","pop":"10"},{"period":5,"icon":"nt_partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/nt_partlycloudy.gif","title":"Thursday Night","fcttext":"Partly cloudy. Low 41F. Winds NE at 5 to 10 mph.","fcttext_metric":"Partly cloudy. Low near 5C. Winds NE at 10 to 15 km/h.","pop":"10"},{"period":6,"icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","title":"Friday","fcttext":"Intervals of clouds and sunshine. High 58F. Winds E at 5 to 10 mph.","fcttext_metric":"Sunshine and clouds mixed. High 14C. Winds E at 10 to 15 km/h.","pop":"10"},{"period":7,"icon":"nt_partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/nt_partlycloudy.gif","title":"Friday Night","fcttext":"Partly cloudy. Low 44F. Winds E at 5 to 10 mph.","fcttext_metric":"Partly cloudy. Low 6C. Winds E at 10 to 15 km/h.","pop":"10"}]},"simpleforecast":{"forecastday":[{"date":{"epoch":"1476813600","pretty":"7:00 PM BST on October 18, 2016","day":18,"month":10,"year":2016,"yday":291,"hour":19,"min":"00","sec":0,"isdst":"1","monthname":"October","monthname_short":"Oct","weekday_short":"Tue","weekday":"Tuesday","ampm":"PM","tz_short":"BST","tz_long":"Europe/London"},"period":1,"high":{"fahrenheit":"55","celsius":"13"},"low":{"fahrenheit":"43","celsius":"6"},"conditions":"Partly Cloudy","icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","skyicon":"","pop":0,"qpf_allday":{"in":0.00,"mm":0},"qpf_day":{"in":0.00,"mm":0},"qpf_night":{"in":0.00,"mm":0},"snow_allday":{"in":0.0,"cm":0.0},"snow_day":{"in":0.0,"cm":0.0},"snow_night":{"in":0.0,"cm":0.0},"maxwind":{"mph":20,"kph":32,"dir":"WNW","degrees":293},"avewind":{"mph":16,"kph":26,"dir":"WNW","degrees":293},"avehumidity":71,"maxhumidity":0,"minhumidity":0},{"date":{"epoch":"1476900000","pretty":"7:00 PM BST on October 19, 2016","day":19,"month":10,"year":2016,"yday":292,"hour":19,"min":"00","sec":0,"isdst":"1","monthname":"October","monthname_short":"Oct","weekday_short":"Wed","weekday":"Wednesday","ampm":"PM","tz_short":"BST","tz_long":"Europe/London"},"period":2,"high":{"fahrenheit":"56","celsius":"13"},"low":{"fahrenheit":"41","celsius":"5"},"conditions":"Partly Cloudy","icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","skyicon":"","pop":10,"qpf_allday":{"in":0.00,"mm":0},"qpf_day":{"in":0.00,"mm":0},"qpf_night":{"in":0.00,"mm":0},"snow_allday":{"in":0.0,"cm":0.0},"snow_day":{"in":0.0,"cm":0.0},"snow_night":{"in":0.0,"cm":0.0},"maxwind":{"mph":15,"kph":24,"dir":"NW","degrees":318},"avewind":{"mph":12,"kph":19,"dir":"NW","degrees":318},"avehumidity":79,"maxhumidity":0,"minhumidity":0},{"date":{"epoch":"1476986400","pretty":"7:00 PM BST on October 20, 2016","day":20,"month":10,"year":2016,"yday":293,"hour":19,"min":"00","sec":0,"isdst":"1","monthname":"October","monthname_short":"Oct","weekday_short":"Thu","weekday":"Thursday","ampm":"PM","tz_short":"BST","tz_long":"Europe/London"},"period":3,"high":{"fahrenheit":"59","celsius":"15"},"low":{"fahrenheit":"41","celsius":"5"},"conditions":"Partly Cloudy","icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","skyicon":"","pop":10,"qpf_allday":{"in":0.00,"mm":0},"qpf_day":{"in":0.00,"mm":0},"qpf_night":{"in":0.00,"mm":0},"snow_allday":{"in":0.0,"cm":0.0},"snow_day":{"in":0.0,"cm":0.0},"snow_night":{"in":0.0,"cm":0.0},"maxwind":{"mph":10,"kph":16,"dir":"N","degrees":2},"avewind":{"mph":7,"kph":11,"dir":"N","degrees":2},"avehumidity":78,"maxhumidity":0,"minhumidity":0},{"date":{"epoch":"1477072800","pretty":"7:00 PM BST on October 21, 2016","day":21,"month":10,"year":2016,"yday":294,"hour":19,"min":"00","sec":0,"isdst":"1","monthname":"October","monthname_short":"Oct","weekday_short":"Fri","weekday":"Friday","ampm":"PM","tz_short":"BST","tz_long":"Europe/London"},"period":4,"high":{"fahrenheit":"58","celsius":"14"},"low":{"fahrenheit":"44","celsius":"7"},"conditions":"Partly Cloudy","icon":"partlycloudy","icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif","skyicon":"","pop":10,"qpf_allday":{"in":0.00,"mm":0},"qpf_day":{"in":0.00,"mm":0},"qpf_night":{"in":0.00,"mm":0},"snow_allday":{"in":0.0,"cm":0.0},"snow_day":{"in":0.0,"cm":0.0},"snow_night":{"in":0.0,"cm":0.0},"maxwind":{"mph":10,"kph":16,"dir":"E","degrees":91},"avewind":{"mph":7,"kph":11,"dir":"E","degrees":91},"avehumidity":79,"maxhumidity":0,"minhumidity":0}]}},"moon_phase":{"percentIlluminated":"93","ageOfMoon":"17","phaseofMoon":"Waning Gibbous","hemisphere":"North","current_time":{"hour":"8","minute":"07"},"sunrise":{"hour":"7","minute":"46"},"sunset":{"hour":"18","minute":"15"},"moonrise":{"hour":"20","minute":"10"},"moonset":{"hour":"10","minute":"24"}},"sun_phase":{"sunrise":{"hour":"7","minute":"46"},"sunset":{"hour":"18","minute":"15"}},"almanac":{"airport_code":"EGFF","temp_high":{"normal":{"F":"55","C":"12"},"record":{"F":"66","C":"18"},"recordyear":"1997"},"temp_low":{"normal":{"F":"46","C":"7"},"record":{"F":"33","C":"0"},"recordyear":"1998"}}}'
weather_report = json.loads(json_string)
print_path("dev/blah/weather/", weather_report, "")
编辑>>
这是我从脚本中得到的一些输出
...
dev/blah/weather/sunrise/minute 46
dev/blah/weather/sunrise/hour 7
dev/blah/weather/sunset/minute 15
dev/blah/weather/sunset/hour 18
dev/blah/weather/sunrise/minute 46
dev/blah/weather/sunrise/hour 7
dev/blah/weather/txt_forecast/date 7:03 AM BST
dev/blah/weather/txt_forecast/forecastday [{u'title': u'Tuesday', u'icon_url': u'http://icons.wxug.com/i/c/k/partlycloudy.gif', u'fcttext_metric': u'Sun and clouds mixed. High 12C. Winds WNW at 15 to 30 km/h.', u'period': 0, u'pop': u'0', u'fcttext': u'Sun and clouds mixed. High around 55F. Winds WNW at 10 to 20 mph.', u'icon': u'partlycloudy'}, {u'title': u'Tuesday Night', u'icon_url': u'http://icons.wxug.com/i/c/k/nt_partlycloudy.gif', u'fcttext_metric': u'Partly cloudy. Low 6C. Winds WNW at 10 to 15 km/h.', u'period': 1, u'pop': u'10', u'fcttext': u'Partly cloudy skies. Low 43F. Winds WNW at 5 to 10 mph.', u'icon': u'nt_partlycloudy'}, {u'title': u'Wednesday', u'icon_url': u'http://icons.wxug.com/i/c/k/partlycloudy.gif', u'fcttext_metric': u'Partly to mostly cloudy. High 13C. Winds NW at 15 to 25 km/h.', u'period': 2, u'pop': u'10', u'fcttext': u'Partly cloudy skies in the morning will give way to cloudy skies during the afternoon.
这里的最后一个条目应该是
dev/blah/weather/txt_forecast/forecastday/0/title Tuesday
dev/blah/weather/txt_forecast/forecastday/0/icon partlycloudy
而是显示
[{u'title': u'Tuesday', u'icon_url': u'http://icons.wxug.com/i/c/k/partlycloudy.gif', u'fcttext_metric': u'Sun and clouds mixed. High 12C. Winds WNW at 15 to 30 km/h.', u'perio...
只需将常规 for 循环混入该递归中以迭代列表。
def print_path(root, data, path):
for element, val in data.items():
if isinstance(val, dict):
print_path(root, val, element+"/")
elif isinstance(val, list):
list_path = path+element+"/"
for i, item in enumerate(val):
print_path(root, item, list_path+str(i)+"/")
else:
print root + path + element, val
应该在输出中看到 dev/blah/weather/txt_forecast/forecastday/0/title Tuesday