RE: Help with a Python Program
- From: BlueScale <bluescale1976@xxxxxxx>
- To: programmingblind@xxxxxxxxxxxxx
- Date: Wed, 08 Oct 2008 01:14:17 -0400
Thanks for the tip. I'll go back to Google land and see what I can do
about re-writing it.
Thanks
On Tue, 2008-10-07 at 23:11 -0500, Ken Perry wrote:
>
>
> Just a hint on this code you can speed it up a heck of a lot if you
> get away from dom and use sax or the simple template parser in python.
> Its not that important to speed up on a PC but I am currently coding
> on a PDA and this runs a bit slow do to the interpreter and the dom.
>
> Ken
>
>
>
>
> ______________________________________________________________________
> From: programmingblind-bounce@xxxxxxxxxxxxx
> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of BlueScale
> Sent: Monday, October 06, 2008 10:39 PM
> To: programmingblind@xxxxxxxxxxxxx
> Subject: RE: Help with a Python Program
>
>
>
>
> Hi,
> Thanks for responding. I actually just finished writing my own. I
> never did get that code shrunk down to size, so I visited the Yahoo
> developer site and read through the documentation and code samples.
> It took a lot of trial and error, but I finally got it working! I
> also learned a little more about Python in the process.
> If anyone else would like the code, here it is:
> #change zipCode to your zip code
> zipCode = 0
> def getWeather(zip_code):
> if zip_code != 0:
> import urllib
> from xml.dom import minidom
> WEATHER_URL = 'http://xml.weather.yahoo.com/forecastrss?p=%s'
> WEATHER_NS = 'http://xml.weather.yahoo.com/ns/rss/1.0'
> url = WEATHER_URL % zip_code
> dom = minidom.parse(urllib.urlopen(url))
> ycondition = dom.getElementsByTagNameNS(WEATHER_NS,
> 'condition')[0]
> weatherReport = ycondition.getAttribute('temp') + ' | ' +
> ycondition.getAttribute('text')
> else:
> weatherReport = "No zip code set."
> return weatherReport
> print getWeather(zipCode)
>
>
>
>
> On Mon, 2008-10-06 at 22:28 -0500, Ken Perry wrote:
>
> > This is pretty easy to do. Unfortunately I am extremely busy right
> > this minute. However if no one gets to you till Wednesday I will
> > get to it.
> > Ken
> >
> >
> > ____________________________________________________________________
> >
> > From: programmingblind-bounce@xxxxxxxxxxxxx
> > [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of
> > BlueScale
> > Sent: Sunday, October 05, 2008 10:39 PM
> > To: programmingblind@xxxxxxxxxxxxx
> > Subject: Help with a Python Program
> >
> >
> >
> > Hi,
> > I found this program to get the weather with a commandline program.
> > I want to modify it for use inside another program, but every time I
> > do anything to it I end up breaking it. I am still very new at
> > Python. I would like it simplified quite a bit. All I need is a
> > variable set at the top with a 5 digit zipcode, so it is easy to
> > modify. I would like it to only return the current temp followed by
> > the current condition. For example, when ran it should return
> > something like 78F | cloudy. I need to remove the extended forecast
> > and the commandline arguments. Can someone please help with this
> > and send me some info on how it was done? I thought it would be easy
> > to do but apparently I was wrong. *grin* It would be even better if
> > the whole program could be simplified down to one function, but I am
> > not sure that will be possible.
> > Thanks for the help, and here is the code:
> > #! /usr/bin/python
> >
> > """
> > Fetches weather reports from Yahoo!
> >
> > Written by Thomas Upton (http://thomas.fiveuptons.com/),
> > with contributions from Chris Lasher
> > (http://igotgenes.blogspot.com/).
> >
> > This code is licensed under a BY-NC-SA Creative Commons license.
> > http://creativecommons.org/licenses/by-nc-sa/3.0/us/
> > """
> >
> > import sys
> > import urllib
> > from optparse import OptionParser
> > from xml.dom.minidom import parse
> >
> > # Yahoo!'s limit on the number of days they will forecast for
> > DAYS_LIMIT = 2
> > WEATHER_URL = 'http://xml.weather.yahoo.com/forecastrss?p=%s'
> > WEATHER_NS = 'http://xml.weather.yahoo.com/ns/rss/1.0'
> >
> > def get_weather(zip_code, days):
> > """
> > Fetches weather report from Yahoo!
> >
> > :Parameters:
> > -`zip_code`: A five digit US zip code.
> > -`days`: number of days to obtain forecasts for
> >
> > :Returns:
> > -`weather_data`: a dictionary of weather data
> >
> > """
> >
> > # Get the correct weather url.
> > url = WEATHER_URL % zip_code
> >
> > # Parse the XML feed.
> > dom = parse(urllib.urlopen(url))
> >
> > # Get the units of the current feed.
> > yunits = dom.getElementsByTagNameNS(WEATHER_NS, 'units')[0]
> >
> > # Get the location of the specified zip code.
> > ylocation = dom.getElementsByTagNameNS(WEATHER_NS, 'location')[0]
> >
> > # Get the currrent conditions.
> > ycondition = dom.getElementsByTagNameNS(WEATHER_NS,
> > 'condition')[0]
> >
> > # Hold the forecast in a hash.
> > forecasts = []
> >
> > # Walk the DOM in order to find the forecast nodes.
> > for i, node in enumerate(
> > dom.getElementsByTagNameNS(WEATHER_NS,'forecast')):
> > # Stop if the number of obtained forecasts equals the number
> > of requested days
> > if i + 1 > days:
> > break
> > else:
> > # Insert the forecast into the forcast dictionary.
> > forecasts.append (
> > {
> > 'date': node.getAttribute('date'),
> > 'low': node.getAttribute('low'),
> > 'high': node.getAttribute('high'),
> > 'condition': node.getAttribute('text')
> > }
> > )
> >
> > # Return a dictionary of the weather that we just parsed.
> > weather_data = {
> > 'current_condition': ycondition.getAttribute('text'),
> > 'current_temp': ycondition.getAttribute('temp'),
> > 'forecasts': forecasts,
> > 'units': yunits.getAttribute('temperature'),
> > 'city': ylocation.getAttribute('city'),
> > 'region': ylocation.getAttribute('region'),
> > }
> >
> > return weather_data
> >
> > def create_report(weather_data, options):
> > """
> > Constructs a weather report as a string.
> >
> > :Parameters:
> > -`weather_data`: a dictionary of weather data
> > -`options`: options to determine output selections
> >
> > :Returns:
> > -`report_str`: a formatted string reporting weather
> >
> > """
> >
> > report = []
> >
> > if options.location:
> > if options.verbose:
> > # Add the location header.
> > report.append("Location:")
> >
> > # Add the location.
> > location_string = "%(city)s, %(region)s\n" % weather_data
> > report.append(location_string)
> >
> > if (not options.nocurr):
> > if options.verbose:
> > # Add current conditions header.
> > report.append("Current conditions:")
> >
> > # Add the current weather.
> > currstr = "%(current_temp)s%(units)s | %(current_condition)s
> > \n" % weather_data
> > report.append(currstr)
> >
> > if (options.forecast > 0):
> > if options.verbose:
> > # Add the forecast header.
> > report.append("Forecast:")
> >
> > # Add the forecasts.
> > for forecast in weather_data['forecasts']:
> >
> > forecast['units'] = weather_data['units']
> >
> > forecast_str = """\
> > %(date)s
> > Low: %(low)s%(units)s
> > High: %(high)s%(units)s
> > Condition: %(condition)s
> > """ % forecast
> >
> > report.append(forecast_str)
> >
> > report_str = "\n".join(report)
> >
> > return report_str
> >
> > def create_cli_parser():
> > """Creates a command line interface parser."""
> >
> > usage = (
> > "%prog [options] zip_code",
> > __doc__,
> > """\
> > Arguments:
> > ZIPCODE: The ZIP code for the region of interest.
> > """
> > )
> >
> > usage = "\n\n".join(usage)
> >
> > cli_parser = OptionParser(usage)
> >
> > # Add the CLI options
> > cli_parser.add_option('-c', '--nocurr', action='store_true',
> > help="Suppress reporting the current weather conditions"
> > )
> >
> > cli_parser.add_option('-f', '--forecast', action='store',
> > type='int',
> > help="Show the forecast for DAYS days", metavar="DAYS")
> >
> > cli_parser.add_option('-l', '--location', action='store_true',
> > help="Give the location of the weather"
> > )
> >
> > cli_parser.add_option('-v', '--verbose', action='store_true',
> > help="Print the weather section headers"
> > )
> >
> > cli_parser.set_defaults(forecast=0)
> >
> > return cli_parser
> >
> > def main(argv):
> >
> > # Create the command line parser.
> > cli_parser = create_cli_parser()
> >
> > # Get the options and arguments.
> > opts, args = cli_parser.parse_args(argv)
> >
> > # Check that an argument was passed.
> > if len(args) < 1:
> > cli_parser.error("Not enough arguments supplied.")
> >
> > # Check the zip code
> > zip_code = args[0]
> >
> > if len(zip_code) != 5 or not zip_code.isdigit():
> > cli_parser.error("ZIP code must be 5 digits")
> >
> > if opts.forecast > DAYS_LIMIT or opts.forecast < 0:
> > cli_parser.error("Days to forecast must be between 0 and %d" %
> > DAYS_LIMIT)
> >
> > # Get the weather.
> > weather = get_weather(zip_code, opts.forecast)
> >
> > # Create the report.
> > report = create_report(weather, opts)
> >
> > print report
> >
> > if __name__ == "__main__":
> > main(sys.argv[1:])
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