From dcca5909918b267a473d6f85be8d5be630495f89 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Sun, 2 Mar 2014 20:29:01 +0100 Subject: partial implemention of weather monitoring MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/plugins/weather.py | 141 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 141 insertions(+) create mode 100644 src/plugins/weather.py (limited to 'src/plugins') diff --git a/src/plugins/weather.py b/src/plugins/weather.py new file mode 100644 index 0000000..58d12ad --- /dev/null +++ b/src/plugins/weather.py @@ -0,0 +1,141 @@ +# -*- python -*- +''' +xpybar – xmobar replacement written in python +Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) + +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 3 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, see . +''' + +from util import * + + +class Weather: + ''' + Weather monitor + + @variable icao:str The station's International Civil Aviation Organization airport code + @variable station:str The station as a human readable, not necessarily only the airport name + @variable location:str Human readable location, country or state (abbreviated) and country. + @variable latitude:float The latitude position of the station, in degrees to north with two decimals + @variable longitude:float The longitude position of the station, in degrees to east with two decimals + @variable headers:list Headers in the decoded metar data + @variable fields:dict Fields in the decoded metar data + @variable time:(int, int, int) The time observation was made: day of month, hour and minute, in UTC + + The following will be `None` if not found in the data, but it is probably found if it should not be `None`. + They can be floating point, but are most often integers. + + @variable wind_dir:float? The wind direction, `None` if variable + @variable wind_speed:float The wind speed in knots + @variable wind_gusts:float? The wind gusts in knots + @variable wind_var:(float, float)? The wind direction range, `None` if less than 60° variation + @variable temp:float The temperature in °C + @variable dew:float The dew point in °C + @variable pressure:flaot The pressure in hPa + @variable visibility:float The visibility in statute miles + ''' + + + def __init__(self, station): + ''' + Constructor + + @param station:str The station's ICAO code (International Civil Aviation Organization airport code) + ''' + self.icao = station + url = 'http://weather.noaa.gov/pub/data/observations/metar/decoded/%s.TXT' % station + decoded = spawn_read('wget', url, '-O', '-').split('\n') + # How to parse: http://www.wunderground.com/metarFAQ.asp + + station_header, self.headers, decoded = decoded[0].split(', '), decoded[:2], decoded[2:] + self.station, station_header = station_header[0], ', '.join(station_header[1:]) + self.location = station_header.split(' (')[0] + self.latitude, self.longitude = station_header.split(') ').split(' ')[2:] + self.latitude, ysign = self.latitude[:-1], self.latitude[-1] == 'S' + self.longitude, xsign = self.longitude[:-1], self.longitude[-1] == 'W' + self.latitude = [float(x) for x in self.latitude.split('-')] + self.longitude = [float(x) for x in self.longitude.split('-')] + self.latitude = self.latitude[0] + self.latitude[1] / 100 + self.longitude = self.longitude[0] + self.longitude[1] / 100 + self.latitude = -(self.latitude) if ysign else self.latitude + self.longitude = -(self.longitude) if xsign else self.longitude + + self.fields = {} + for line in decoded: + line = line.split(': ') + self.fields[line[0]] = ': '.join(line[1:]) + + self.wind_dir, self.wind_speed, self.wind_gusts, self.wind_var = None, None, None, None + self.temp, self.dew, self.pressure, self.visibility = None, None, None, None + + for ob in self.fields['ob'].split(' ')[1:]: + self.__time(ob) + self.__wind(ob) + self.__wind_var(ob) + self.__temp(ob) + self.__pressure(ob) + self.__visibility(ob) + # (-SHRA)-Present Weather and Obscurations from http://www.wunderground.com/metarFAQ.asp + # BKN070-Sky Condition from http://www.wunderground.com/metarFAQ.asp + + #Wind: from the N (010 degrees) at 18 MPH (16 KT):0 + #Visibility: 3 mile(s):0 + #Sky conditions: overcast + #Weather: precipitation + #Precipitation last hour: A trace -- sometimes + #Temperature: 10.0 F (-12.2 C) + #Windchill: -7 F (-22 C):2 -- sometimes + #Dew Point: 3.9 F (-15.6 C) + #Relative Humidity: 75% + #Pressure (altimeter): 30.19 in. Hg (1022 hPa) + + + def __time(self, ob): + ob_ = list(filter(lambda c : not ('0' <= c <= '9'), ob)) + if (len(ob_) == 1) and ob.endswith('Z'): + self.time = (ob[0 : 2], ob[2 : 4], ob[4 : 6]) + + def __wind(self, ob): + if ob.endswith('KT'): + self.wind_dir = None if ob.startswith('VRB') else float(ob[:3]) + ob = ob[3:] + if self.wind_dir is not None: + ob = '0' + ob + self.wind_speed, ob = float(ob[:3]), wind[3:] + self.wind_gusts = float(ob[1 : -2]) if ob[0] == 'G' else None + + def __wind_var(self, ob): + if (len(ob) == 7) and (ob[3] == 'V'): + if len(list(filter(lambda c : not ('0' <= c <= '9'), ob))) == 1: + self.wind_dir = (float(ob[:3]), float(ob[-3:])) + + def __temp(self, ob): + if '/' in ob: + ob = ob.replace('M', '-') + if len(list(filter(lambda c : not ('0' <= c <= '9'), ob.replace('-', '0')))) == 1: + (self.temp, self.dew) = [float(x) for x in ob.split('/')] + + def __pressure(self, ob): + if (len(ob) == 5) and (ob[0] in ['Q', 'A']): + if len(list(filter(lambda c : not ('0' <= c <= '9'), ob))) == 1: + if ob[0] == 'Q': + self.pressure = float(ob[1:]) + else: + self.pressure = 33.86 * float(ob[1:]) / 100 + + def __visibility(self, ob): + if ob.endswith('SM') and (len(ob) > 0): + if len(list(filter(lambda c : not ('0' <= c <= '9'), ob))) == 2: + self.visibility = float(ob[:-2]) + -- cgit v1.2.3-70-g09d2