python - Pythonでyahoo weather xmlを解析するときのエラー

Question

私は解決策を探していたので、データベース内の場所 ID の気象情報を取得しようとしています。これは、モデルから location_id を使用し、データベース内のモデルの気象ログに情報を保存することを意味します。これはコードであり、以下のエラー：

 ![# -*- coding: UTF-8 -*-
    import urllib
    from xml.dom import minidom
    from xml.dom.minidom import parse
    from argparse import ArgumentParser
    from pprint import pprint
    from datetime import datetime

    from django.db import models
    from django.core.management.base import NoArgsCommand

    Location = models.get_model("weatherapp", "Location")
    WeatherLog = models.get_model("weatherapp", "WeatherLog")

    SILENT, NORMAL, VERBOSE = 0, 1, 2

    WEATHER_URL = 'http://weather.yahooapis.com/forecastrss?p=%s&u=c'
    METRIC_PARAMETER = ''
    WEATHER_NS = "http://xml.weather.yahoo.com/ns/rss/1.0"

    def weather_for_location(location_id, options):
        # taken from http://developer.yahoo.com/python/python-xml.html
        # and modified a little
        url = WEATHER_URL % location_id


        try:
            dom = minidom.parse(urllib.urlopen(url))
        except Exception:
            return None


     # Get the units of the current feed.
        yunits = dom.getElementsByTagNameNS(WEATHER_NS, 'units') \[0\]


        # Get the location of the specified location code.
        ylocation = dom.getElementsByTagNameNS(WEATHER_NS, 'location') \[0\]

        # Get the current conditions.
        ycondition = dom.getElementsByTagNameNS(WEATHER_NS, 'condition') \[0\]

        forecasts = \[\]
        for node in enumerate( dom.getElementsByTagNameNS(WEATHER_NS, 'forecast')):
               forecasts.append({
                    'date': node.getAttribute('date'),
                    'low': node.getAttribute('low'),
                    'high': node.getAttribute('high'),
                    'condition': node.getAttribute('text')
               })

        return {
            'current_condition': ycondition.getAttribute('text'),
            'current_temp': ycondition.getAttribute('temp'),
            'current_humidity': yatmosphere.getAttribute('humidity'),
            'current_visibility': yatmosphere.getAttribute('visibility'),
            'current_wind_speed': ywind.getAttribute('speed'),
            'forecasts': forecasts,
            'title': dom.getElementsByTagName('title')\[0\].firstChild.data,
            'guid': dom.getElementsByTagName('guid')\[0\].firstChild.data,
        }            

    class Command(NoArgsCommand):
        help = "Aggregates data from weather feed"
        def handle_noargs(self, **options):
            verbosity = int(options.get('verbosity', NORMAL))

            created_count = 0
            for l in Location.objects.all():
                weather = weather_for_location(l.location_id, options)
                if verbosity > NORMAL:
                    pprint(weather)
                timestamp_parts = map(int, weather\['guid'\].split("_")\[1:-1\])
                timestamp = datetime(*timestamp_parts)
                log, created = WeatherLog.objects.get_or_create(
                     location=l,
                     timestamp=timestamp,
                     defaults={
                        'temperature': weather\['current_temp'\],
                        'humidity': weather\['current_humidity'\],
                        'wind_speed': weather\['current_wind_speed'\],
                        'visibility': weather\['current_visibility'\],
                        }
                     )
                if created:
                    created_count += 1
            if verbosity > NORMAL:
                print "New weather logs: %d" % created_count][1]

エラー：

> File
> "/home/temi/rapidsmstuts/myapp/weatherapp/management/commands/check_weather.py",
> line 74, in handle_noargs
>     timestamp_parts = map(int, weather['guid'].split("_")[1:-1]) TypeError: 'NoneType' object has no attribute '__getitem__'


File "/home/temi/rapidsmstuts/myapp/weatherapp/management/commands/check_weather.py", line 47, in weather_for_location
    'date': node.getAttribute('date'),
AttributeError: 'tuple' object has no attribute 'getAttribute'




File "/home/temi/rapidsmstuts/myapp/weatherapp/management/commands/check_weather.py", line 35, in weather_for_location
    yunits = dom.getElementsByTagNameNS(WEATHER_NS, 'units') [0]
IndexError: list index out of range