解析Openweather API Python

Question

[好的，我遇到了一些情况，在理解如何从API返回的JSON中提取值方面遇到了障碍。我有以下代码：

import requests
import json

weather_results = []
key = 'somekey'
cities = ['sometown']

def weather_get(apikey, city):
    r = requests.get('http://api.openweathermap.org/data/2.5/weather?q={},canada&APPID={}'.format(city, apikey))
    return(r.text)

这将返回一个长字符串，其格式如下：

[u'{"coord":{"lon":-73.59,"lat":45.51},"weather":[{"id":521,"main":"Rain","description":"shower rain","icon":"09d"}],"base":"stations","main":{"temp":277.5,"pressure":1022,"humidity":55,"temp_min":277.15,"temp_max":278.15},"visibility":24140,"wind":{"speed":3.1,"deg":300},"clouds":{"all":90},"dt":1490810400,"sys":{"type":1,"id":3829,"message":0.0973,"country":"CA","sunrise":1490783901,"sunset":1490829598},"id":6077243,"name":"Montreal","cod":200}']

现在，如果我这样写一个函子：

def get_temp_min(arg):
for items in arg:
    data = json.loads(items)
    for key, value in data['main'].items():
        if key=='temp_min':
            return(value)

它将返回以下值，但是如果我尝试：

def get_weather_description(arg):
for items in arg:
    data = json.loads(items)
    for key, value in data['weather'].items():
      if key=='description':
          return(value)

我没有得到想要的响应类型。我已经尝试过类似的方法，以查看是否可以更深入地了解JSON：

def get_weather_description(arg):
for items in arg:
    data = json.loads(items)
    for key, value in data.items():
        if key=='weather':
            data2= value
            for items in data2:
                data3 = items

但是我觉得我目前不在正确的轨道上，如果有人可以提供一些建议，我将非常感激。

Answer 1

所以，我做了很多事情使它变得更好，我已经实现了@ kiran.kodur对[]的建议。

def weather_get(apikey, city):
r = requests.get('http://api.openweathermap.org/data/2.5/weather?q={},canada&APPID={}'.format(city, apikey))
return(r.json())
'return（r.json（））'使代码更干净：

def get_temp(arg):
for items in arg:
    for key, value in items['main'].items():
        if key=='temp':
            return(value)
def get_pressure(arg):
    for items in arg:
        for key, value in items['main'].items():
            if key=='pressure':
                return(value)
def get_temp_min(arg):
    for items in arg:
        for key, value in items['main'].items():
            if key=='temp_min':
                return(value)
还发现我需要修改：

for key, value in data.items()
收件人：

for key, value in items['weather'][0].items():
我能够返回我需要的东西。 

Answer 2

我写了一个小函数来从openweatherdata提供的天气数据中获取所需的信息。