Beginning Python #11 - Full Circle Magazine

""" w_currents.py
Returns current conditions, forecast and alerts for a given zipcode from WeatherUnderground.com.
Usage: python wonderground.py [options]
Options:
-h, --help Show this help
-l, --location City,State to use
-z, --zip Zipcode to use as location

Examples:
w_currents.py -h (shows this help information)
w_currents.py -z 80013 (uses the zip code 80013 as location)
"""

from xml.etree import ElementTree as ET
import urllib
import sys
import getopt

class CurrentInfo:
"""
This routine retrieves the current condition xml data from WeatherUnderground.com
based off of the zip code or Airport Code...
currently tested only with Zip Code and Airport code
For location,
if zip code use something like 80013 (no quotes)
if airport use something like "KDEN" (use double quotes)
if city/state (US) use something like "Aurora,%20CO" or "Aurora,CO" (use double quotes)
if city/country, use something like "London,%20England" (use double quotes)
"""
def getCurrents(self,debuglevel,Location):
if debuglevel > 0:
print "Location = %s" % Location
try:
CurrentConditions = 'http://api.wunderground.com/auto/wui/geo/WXCurrentObXML/index.xml?query=%s' % Location
urllib.socket.setdefaulttimeout(8)
usock = urllib.urlopen(CurrentConditions)
tree = ET.parse(usock)
usock.close()
except:
print 'ERROR - Current Conditions - Could not get information from server...'
if debuglevel > 0:
print Location
sys.exit(2)
# Get Display Location
for loc in tree.findall("//full"):
self.location = loc.text
# Get Observation time
for tim in tree.findall("//observation_time"):
self.obtime = tim.text
# Get Current conditions
for weather in tree.findall("//weather"):
self.we = weather.text
# Get Temp
for TempF in tree.findall("//temperature_string"):
self.tmpB = TempF.text
#Get Humidity
for hum in tree.findall("//relative_humidity"):
self.relhum = hum.text
# Get Wind info
for windstring in tree.findall("//wind_string"):
self.winds = windstring.text
# Get Barometric Pressure
for pressure in tree.findall("//pressure_string"):
self.baroB = pressure.text

def output(self):
print 'Weather Information From Wunderground.com'
print 'Weather info for %s ' % self.location
print self.obtime
print 'Current Weather - %s' % self.we
print 'Current Temp - %s' % self.tmpB
print 'Barometric Pressure - %s' % self.baroB
print 'Relative Humidity - %s' % self.relhum
print 'Winds %s' % self.winds
def DoIt(self,Location):
self.getCurrents(1,Location)
self.output()

def usage():
print __doc__
def main(argv):
location = 80013
try:
opts, args = getopt.getopt(argv, "hz:l:", ["help=", "zip=", "location="])
except getopt.GetoptError:
usage()
sys.exit(2)
for opt, arg in opts:
if opt in ("-h", "--help"):
usage()
sys.exit()
elif opt in ("-l", "--location"):
location = arg
elif opt in ("-z", "--zip"):
location = arg
print "Location = %s" % location
currents = CurrentInfo()
currents.DoIt(location)

#===========================================================
# Main loop
#===========================================================
if __name__ == "__main__":

main(sys.argv[1:])