Twitter Weather station

Create your own weather station on Twitter.

With a few simple steps and the following code, you can have weather information for where you live automatically updated to your twitter account. The following steps and python program are for a Unix/Linux/Mac environment. I am sure they can easily be adapted to Windows.

  • Save the following program on you computer under the name of your choice. You can also choose to download this program from here. Don't forget to set the execute mode for this file with: 
    chmod a+x /usr/local/bin/twitter_weather.py
    chmod a+x /usr/local/bin/twitter_weather.py

  • Update the variable USERNAME and PASSWORD with the username and password of your twitter account.

  • Update the variable URL with the XML file for your city. A list of supported cities can be found at http://www.weather.gov/xml/current_obs/. Be careful to use the XML and not the RSS link

  • Create a crontab entry in you system to update the weather every few hours. A reasonable value will be every 6 hours.
    1 */6 * * *     /usr/local/bin/twitter_weather.py
    1 */6 * * * /usr/local/bin/twitter_weather.py


Now you have weather information updated 6 times a day.
http://fred.velvnet.com/SFOWeather.png


The source code

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from xml.etree import ElementTree as ET
import urllib2
import twitter

# information that need to be modified
# Source for the city codes at http://www.weather.gov/xml/current_obs/
URL = 'http://www.weather.gov/xml/current_obs/KSFO.xml'
USERNAME='weathertest'
PASSWORD='*******'
# end of modifiable informtion
    
class Weather:
    def __init__(self, url):
        fd = urllib2.urlopen(url)
        tree = ET.parse(fd)
        self.root = tree.getroot()
        fd.close()

    def get(self, key):
        return self.root.find(key).text
        
    def temp_f(self):
        return self.get('temp_f')
        
    def weather(self):
        return self.get('weather')

    def wind_dir(self):
        return self.get('wind_dir')
    
    def humidity(self):
        return self.get('relative_humidity')
    
    def wind_degrees(self):
        return self.get('wind_degrees')

    def wind_mph(self):
        return self.get('wind_mph')

    def pressure(self):
        return self.get('pressure_mb')

    def twit(self):
        weather = "%s %sºF" % (self.weather(), self.temp_f())
        pressure = "Pressure: %s mb" % (self.pressure())
        humidity = "Humidity: %s" % (self.humidity())
        wind = "Wind: %s %sº %s MPH" % (self.wind_dir(), self.wind_degrees(),
                                        self.wind_mph())
        return ' - '.join((weather, pressure, humidity, wind))

def main():
    try:
        weather = Weather(URL)
        tw = twitter.Api(username=USERNAME, password=PASSWORD)
        tw.PostUpdate(weather.twit().decode('utf-8'))
    except Exception, why:
        print str(why)
        
if __name__ == "__main__":
    main()

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from xml.etree import ElementTree as ET
import urllib2
import twitter

# information that need to be modified
# Source for the city codes at http://www.weather.gov/xml/current_obs/
URL = 'http://www.weather.gov/xml/current_obs/KSFO.xml'
USERNAME='weathertest'
PASSWORD='*******'
# end of modifiable informtion

class Weather:
def __init__(self, url):
fd = urllib2.urlopen(url)
tree = ET.parse(fd)
self.root = tree.getroot()
fd.close()

def get(self, key):
return self.root.find(key).text

def temp_f(self):
return self.get('temp_f')

def weather(self):
return self.get('weather')

def wind_dir(self):
return self.get('wind_dir')

def humidity(self):
return self.get('relative_humidity')

def wind_degrees(self):
return self.get('wind_degrees')

def wind_mph(self):
return self.get('wind_mph')

def pressure(self):
return self.get('pressure_mb')

def twit(self):
weather = "%s %sºF" % (self.weather(), self.temp_f())
pressure = "Pressure: %s mb" % (self.pressure())
humidity = "Humidity: %s" % (self.humidity())
wind = "Wind: %s %sº %s MPH" % (self.wind_dir(), self.wind_degrees(),
self.wind_mph())
return ' - '.join((weather, pressure, humidity, wind))

def main():
try:
weather = Weather(URL)
tw = twitter.Api(username=USERNAME, password=PASSWORD)
tw.PostUpdate(weather.twit().decode('utf-8'))
except Exception, why:
print str(why)

if __name__ == "__main__":
main()


If you are using this program you can post a comment here or send me an email and I will follow your weather station from the ones I am already running on twitter.

Some examples

 
This article has been posted on Feb 17, 2009 by Fred Cirera @ 22:35. This article has been registered in the categories python, programming,

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When I run the script it throws the following error:

slash2:Downloads dafuser$ ./mini_weather.py Traceback (most recent call last): File "./mini_weather.py", line 5, in [HTML_REMOVED] import twitter ImportError: No module named twitter

I get the same error if I download the script from the download page or if I copy the script from the displayed source file.

I'm running the script on a Mac running Leopard 10.5.6 with

Python 2.5.1 (r251:54863, Jan 13 2009, 10:26:13) [GCC 4.0.1 (Apple Inc. build 5465)] on darwin

Any idea what's causing the error?

Thanks

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