weather2.py

import urllib2
import json
key = "[your API key]"
while 1:
    zip = raw_input('For which ZIP code would you like to see the weather forecast? ')
    url = 'http://api.wunderground.com/api/' + key + '/geolookup/forecast10day/q/' + zip + '.json'
    f = urllib2.urlopen(url)
    json_string = f.read()
    parsed_json = json.loads(json_string)
    for day in parsed_json['forecast']['simpleforecast']['forecastday']:
    	print day['date']['weekday'] + ' (' + day['date']['pretty'] + '):'
    	print '  Conditions: ' + day['conditions']
    	print '  High:' + day['high']['fahrenheit'] + 'F'
    	print '  Low: ' + day['low']['fahrenheit'] + 'F'
    f.close()