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#! /usr/bin/env python3

import requests

import re

def getLatLonViaYql(city, countryCode):

# build the YQL query

yqlQuery = ('select centroid.latitude,centroid.longitude '

'from geo.places '

'where text="{}" and country.code="{}" and '

'placeTypeName.code="7"'

).format(city, countryCode)

# build the URL

yqlUrl = 'http://query.yahooapis.com/v1/public/yql'

r = requests.get(yqlUrl, params={'q': yqlQuery})

xmlData = r.text

latStr = re.search('latitude>([0-9.-]+)<', xmlData)

lonStr = re.search('longitude>([0-9.-]+)<', xmlData)

if latStr is None or lonStr is None:

print('Warning, unknown city {}'.format(city))

return (0, 0)

lat = float(latStr.group(1))

lon = float(lonStr.group(1))

return (lat, lon)