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#!/usr/bin/env python

# -*- coding: utf-8 -*-

#

# untitled.py

#

# Copyright 2012 Scott Thomson <scotty3785@gmail.com>

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

# MA 02110-1301, USA.

#

#

import urllib

import json

previous_weather_file = "weather_log.txt"

previous_weather = ""

try:

log = open(previous_weather_file,"r")

previous_weather = log.read()

log.close()

except:

print "No previous data"

f = urllib.urlopen("http://api.openweathermap.org/data/2.5/weather?q=Cheltenham,uk")

weather = f.read()

log = open(previous_weather_file,'w')

log.write(weather)

log.close()

weather_json = json.loads(weather)

#print weather

#print weather_json['weather']

curr_temp = float(weather_json['main']['temp'])-273.13

print "Temperature is: %.2f degrees C" % (curr_temp)

if (not previous_weather == ""):

prev_weather_json = json.loads(previous_weather)

prev_temp = float(prev_weather_json['main']['temp'])-273.13

temp_diff = curr_temp - prev_temp

if not( temp_diff == 0.0):

print "Temperature has changed by: %.2f degrees C" % (temp_diff)