这个问题涉及使用python的json module
我的json请求返回：
{
"response":{
"version":"0.1",
"termsofService":"http://www.wunderground.com/weather/api/d/terms.html",
"features":{
"forecast":1
}
},
"forecast":{
"txt_forecast":{
"date":"1:00 AM BST",
"forecastday":[
{
"period":0,
"icon":"partlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/partlycloudy.gif",
"title":"Monday",
"fcttext":"Mostly cloudy. High of 75F. Winds less than 5 mph.",
"fcttext_metric":"Mostly cloudy. High of 24C. Winds less than 5 km/h.",
"pop":"0"
},
{
"period":1,
"icon":"clear",
"icon_url":"http://icons-ak.wxug.com/i/c/k/clear.gif",
"title":"Monday Night",
"fcttext":"Clear. Low of 54F. Winds less than 5 mph.",
"fcttext_metric":"Clear. Low of 12C. Winds less than 5 km/h.",
"pop":"0"
},
{
"period":2,
"icon":"partlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/partlycloudy.gif",
"title":"Tuesday",
"fcttext":"Clear. High of 70F. Winds less than 5 mph.",
"fcttext_metric":"Clear. High of 21C. Winds less than 5 km/h.",
"pop":"0"
},
{
"period":3,
"icon":"mostlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/mostlycloudy.gif",
"title":"Tuesday Night",
"fcttext":"Mostly cloudy. Low of 52F. Winds less than 5 mph.",
"fcttext_metric":"Mostly cloudy. Low of 11C. Winds less than 5 km/h.",
"pop":"0"
},
{
"period":4,
"icon":"mostlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/mostlycloudy.gif",
"title":"Wednesday",
"fcttext":"Overcast. High of 68F. Winds less than 5 mph.",
"fcttext_metric":"Overcast. High of 20C. Winds less than 5 km/h.",
"pop":"0"
},
{
"period":5,
"icon":"chancerain",
"icon_url":"http://icons-ak.wxug.com/i/c/k/chancerain.gif",
"title":"Wednesday Night",
"fcttext":"Mostly cloudy in the evening, then overcast with a chance of rain. Low of 55F. Winds less than 5 mph. Chance of rain 30%.",
"fcttext_metric":"Mostly cloudy in the evening, then overcast with a chance of rain. Low of 13C. Winds less than 5 km/h. Chance of rain 30%.",
"pop":"30"
},
{
"period":6,
"icon":"mostlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/mostlycloudy.gif",
"title":"Thursday",
"fcttext":"Overcast in the morning, then mostly cloudy. High of 66F. Winds from the East at 5 to 10 mph shifting to the North in the afternoon.",
"fcttext_metric":"Overcast in the morning, then mostly cloudy. High of 19C. Winds from the East at 10 to 15 km/h shifting to the North in the afternoon.",
"pop":"0"
},
{
"period":7,
"icon":"mostlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/mostlycloudy.gif",
"title":"Thursday Night",
"fcttext":"Overcast. Low of 54F. Winds from the East at 5 to 10 mph.",
"fcttext_metric":"Overcast. Low of 12C. Winds from the East at 5 to 15 km/h.",
"pop":"0"
}
]
},
"simpleforecast":{
"forecastday":[
{
"date":{
"epoch":"1379970000",
"pretty":"10:00 PM BST on September 23, 2013",
"day":23,
"month":9,
"year":2013,
"yday":265,
"hour":22,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"September",
"weekday_short":"Mon",
"weekday":"Monday",
"ampm":"PM",
"tz_short":"BST",
"tz_long":"Europe/London"
},
"period":1,
"high":{
"fahrenheit":"75",
"celsius":"24"
},
"low":{
"fahrenheit":"54",
"celsius":"12"
},
"conditions":"Partly Cloudy",
"icon":"partlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/partlycloudy.gif",
"skyicon":"partlycloudy",
"pop":0,
"qpf_allday":{
"in":0.00,
"mm":0.0
},
"qpf_day":{
"in":0.00,
"mm":0.0
},
"qpf_night":{
"in":0.00,
"mm":0.0
},
"snow_allday":{
"in":0,
"cm":0
},
"snow_day":{
"in":0,
"cm":0
},
"snow_night":{
"in":0,
"cm":0
},
"maxwind":{
"mph":6,
"kph":10,
"dir":"SE",
"degrees":136
},
"avewind":{
"mph":4,
"kph":6,
"dir":"SE",
"degrees":144
},
"avehumidity":81,
"maxhumidity":85,
"minhumidity":65
},
{
"date":{
"epoch":"1380056400",
"pretty":"10:00 PM BST on September 24, 2013",
"day":24,
"month":9,
"year":2013,
"yday":266,
"hour":22,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"September",
"weekday_short":"Tue",
"weekday":"Tuesday",
"ampm":"PM",
"tz_short":"BST",
"tz_long":"Europe/London"
},
"period":2,
"high":{
"fahrenheit":"70",
"celsius":"21"
},
"low":{
"fahrenheit":"52",
"celsius":"11"
},
"conditions":"Partly Cloudy",
"icon":"partlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/partlycloudy.gif",
"skyicon":"mostlysunny",
"pop":0,
"qpf_allday":{
"in":0.00,
"mm":0.0
},
"qpf_day":{
"in":0.00,
"mm":0.0
},
"qpf_night":{
"in":0.00,
"mm":0.0
},
"snow_allday":{
"in":0,
"cm":0
},
"snow_day":{
"in":0,
"cm":0
},
"snow_night":{
"in":0,
"cm":0
},
"maxwind":{
"mph":5,
"kph":8,
"dir":"SE",
"degrees":127
},
"avewind":{
"mph":4,
"kph":6,
"dir":"SE",
"degrees":139
},
"avehumidity":79,
"maxhumidity":92,
"minhumidity":70
},
{
"date":{
"epoch":"1380142800",
"pretty":"10:00 PM BST on September 25, 2013",
"day":25,
"month":9,
"year":2013,
"yday":267,
"hour":22,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"September",
"weekday_short":"Wed",
"weekday":"Wednesday",
"ampm":"PM",
"tz_short":"BST",
"tz_long":"Europe/London"
},
"period":3,
"high":{
"fahrenheit":"68",
"celsius":"20"
},
"low":{
"fahrenheit":"55",
"celsius":"13"
},
"conditions":"Mostly Cloudy",
"icon":"mostlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/mostlycloudy.gif",
"skyicon":"mostlycloudy",
"pop":0,
"qpf_allday":{
"in":0.00,
"mm":0.0
},
"qpf_day":{
"in":0.00,
"mm":0.0
},
"qpf_night":{
"in":0.06,
"mm":1.5
},
"snow_allday":{
"in":0,
"cm":0
},
"snow_day":{
"in":0,
"cm":0
},
"snow_night":{
"in":0,
"cm":0
},
"maxwind":{
"mph":3,
"kph":5,
"dir":"NNE",
"degrees":14
},
"avewind":{
"mph":2,
"kph":3,
"dir":"East",
"degrees":98
},
"avehumidity":73,
"maxhumidity":95,
"minhumidity":65
},
{
"date":{
"epoch":"1380229200",
"pretty":"10:00 PM BST on September 26, 2013",
"day":26,
"month":9,
"year":2013,
"yday":268,
"hour":22,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"September",
"weekday_short":"Thu",
"weekday":"Thursday",
"ampm":"PM",
"tz_short":"BST",
"tz_long":"Europe/London"
},
"period":4,
"high":{
"fahrenheit":"66",
"celsius":"19"
},
"low":{
"fahrenheit":"54",
"celsius":"12"
},
"conditions":"Mostly Cloudy",
"icon":"mostlycloudy",
"icon_url":"http://icons-ak.wxug.com/i/c/k/mostlycloudy.gif",
"skyicon":"mostlycloudy",
"pop":0,
"qpf_allday":{
"in":0.06,
"mm":1.5
},
"qpf_day":{
"in":0.00,
"mm":0.0
},
"qpf_night":{
"in":0.00,
"mm":0.0
},
"snow_allday":{
"in":0,
"cm":0
},
"snow_day":{
"in":0,
"cm":0
},
"snow_night":{
"in":0,
"cm":0
},
"maxwind":{
"mph":7,
"kph":11,
"dir":"East",
"degrees":87
},
"avewind":{
"mph":6,
"kph":10,
"dir":"ESE",
"degrees":109
},
"avehumidity":81,
"maxhumidity":91,
"minhumidity":76
}
]
}
}
}
我想要返回的是来自json响应的'title'块的特定'fcttxt'的{{1}}和'period'(an integer 0-7)我可以使用以下for循环和打印所有条目（对于'期间'0-7）。
[forecast][txt_forecast][forecastday]返回：
#!/usr/bin/python
import os, sys, datetime, commands
import urllib2
import json
myweather = json.load(urllib2.urlopen("http://api.wunderground.com/api/API_KEY/forecast/q/27.711,17.994.json"))
myweather_sum = myweather['forecast']['txt_forecast']['forecastday']
for period in myweather_sum:
myforday = period['title']
myfctxt = period['fcttext_metric']
print myforday
print myfctxt
print "-----------------------------"
我想使用Wednesday
Overcast with a chance of rain. High of 19C. Winds from the North at 5 to 20 km/h. Chance of rain 50%.
-----------------------------
Wednesday Night
Overcast with a chance of rain in the evening, then mostly cloudy. Low of 9C. Breezy. Winds from the North at 10 to 20 km/h.
-----------------------------
Thursday
Overcast with a chance of rain. High of 16C. Breezy. Winds from the East at 10 to 20 km/h. Chance of rain 50%.
-----------------------------
Thursday Night
Overcast in the evening, then mostly cloudy. Low of 9C. Winds from the SE at 10 to 15 km/h.
-----------------------------
Friday
Overcast in the morning, then clear. High of 19C. Winds from the SSE at 5 to 15 km/h.
-----------------------------
Friday Night
Overcast in the evening, then partly cloudy. Fog overnight. Low of 7C. Winds from the South at 10 to 15 km/h.
-----------------------------
Saturday
Partly cloudy. High of 17C. Breezy. Winds from the SSE at 10 to 20 km/h.
-----------------------------
Saturday Night
Overcast. Fog overnight. Low of 8C. Winds from the SE at 10 to 15 km/h.
（键）来指定返回哪一个预测。
答案 0 :(得分：1)
尝试此循环，假设您所需的期间为3：
#UNTESTED
for period in myweather_sum:
if period['period'] == 3:
myforday = period['title']
myfctxt = period['fcttext_metric']
print myforday
print myfctxt