#!/usr/bin/env python
# -*- coding: utf-8 -*-
from . import base
from xml.dom import minidom
import json
from six.moves.urllib.request import urlopen
from six.moves.urllib.parse import urlencode
QUERY_URL = 'http://query.yahooapis.com/v1/public/yql?'
WEATHER_URL = 'http://weather.yahooapis.com/forecastrss?'
WEATHER_NS = 'http://xml.weather.yahoo.com/ns/rss/1.0'
[docs]class YahooWeather(base.ThreadedPollText):
''' A weather widget, data provided by the Yahoo! Weather API
Format options:
- astronomy_sunrise
- astronomy_sunset
- atmosphere_humidity
- atmosphere_visibility
- atmosphere_pressure
- atmosphere_rising
- condition_text
- condition_code
- condition_temp
- condition_date
- location_city
- location_region
- location_country
- units_temperature
- units_distance
- units_pressure
- units_speed
- wind_chill
'''
defaults = [
# One of (location, woeid) must be set.
(
'location',
None,
'Location to fetch weather for. Ignored if woeid is set.'
),
(
'woeid',
None,
'Where On Earth ID. Auto-calculated if location is set.'
),
(
'format',
'{location_city}: {condition_temp} °{units_temperature}',
'Display format'
),
('metric', True, 'True to use metric/C, False to use imperial/F'),
('up', '^', 'symbol for rising atmospheric pressure'),
('down', 'v', 'symbol for falling atmospheric pressure'),
('steady', 's', 'symbol for steady atmospheric pressure'),
]
def __init__(self, **config):
base.ThreadedPollText.__init__(self, **config)
self.add_defaults(YahooWeather.defaults)
def fetch_woeid(self, location):
url = QUERY_URL + urlencode({
'q': 'select woeid from geo.places where text="%s"' % location,
'format': 'json'
})
try:
response = urlopen(url)
data = json.loads(response.read())
if data['query']['count'] > 1:
return data['query']['results']['place'][0]['woeid']
return data['query']['results']['place']['woeid']
except Exception:
# HTTPError? JSON Error? KeyError? Doesn't matter, return None
return None
def poll(self):
if not self.woeid:
if self.location:
self.woeid = self.fetch_woeid(self.location)
if not self.woeid:
return None
format = 'c' if self.metric else 'f'
url = WEATHER_URL + urlencode({'w': self.woeid, 'u': format})
try:
response = urlopen(url).read()
dom = minidom.parseString(response)
except Exception:
# Invalid response or couldn't parse XML.
return None
structure = (
('location', ('city', 'region', 'country')),
('units', ('temperature', 'distance', 'pressure', 'speed')),
('wind', ('chill', 'direction', 'speed')),
('atmosphere', ('humidity', 'visibility', 'pressure', 'rising')),
('astronomy', ('sunrise', 'sunset')),
('condition', ('text', 'code', 'temp', 'date'))
)
data = {}
for tag, attrs in structure:
element = dom.getElementsByTagNameNS(WEATHER_NS, tag)[0]
for attr in attrs:
data['%s_%s' % (tag, attr)] = element.getAttribute(attr)
if data['atmosphere_rising'] == '0':
data['atmosphere_rising'] = self.steady
elif data['atmosphere_rising'] == '1':
data['atmosphere_rising'] = self.up
elif data['atmosphere_rising'] == '2':
data['atmosphere_rising'] = self.down
return self.format.format(**data)