owm.py

   1 #!/usr/bin/python3
   2
   3 # needs ~/seepark.ini with
   4 # [openweathermap]
   5 # apikey=...
   6 # cityid=..
   7 # 3319578 for Obsteig, AT
   8
   9 from pprint import pprint
  10 import argparse
  11 import configparser
  12 import os
  13 import csv
  14 import datetime
  15 import math
  16 from seeparklib.openweathermap import openweathermap_json
  17
  18 debug = False
  19
  20
  21 def fromtimestamp(timestamp, format):
  22     return datetime.datetime.fromtimestamp(timestamp).strftime(format)
  23
  24
  25 # https://stackoverflow.com/questions/7490660/converting-wind-direction-in-angles-to-text-words
  26 def degToCompass(num):
  27     if num is None or num is math.nan:
  28         return 'N/A'
  29     val=int((num/22.5)+.5)
  30     arr=["N","NNO","NO","ONO","O","OSO", "SO", "SSO","S","SSW","SW","WSW","W","WNW","NW","NNW"]
  31     return arr[(val % 16)]
  32
  33
  34 def extractweatherdata(w):
  35     data = dict(
  36         datetime = w['dt'],
  37         sunrise = w['sys']['sunrise'],
  38         sunset = w['sys']['sunset'],
  39         temp = w['main']['temp'],
  40         pressure = w['main']['pressure'],
  41         humidity = w['main']['humidity'],
  42         visibility = w['visibility'],
  43         weather = w['weather'][0]['description'],
  44         sky = w['weather'][0]['main'],
  45         windspeed = w['wind']['speed'],
  46         cloudiness = w['clouds']['all'],
  47     )
  48
  49     data['sunrise_t'] = fromtimestamp(data['sunrise'], '%H:%M:%S')
  50     data['sunset_t'] = fromtimestamp(data['sunset'], '%H:%M:%S')
  51     data['date'] = fromtimestamp(data['datetime'], '%Y-%m-%d')
  52     data['time'] = fromtimestamp(data['datetime'], '%H:%M:%S')
  53     data['winddegrees'] = w['wind']['deg'] if 'deg' in w['wind'] else math.nan
  54     data['winddirection'] = degToCompass(data['winddegrees'])
  55     data['precipitation'] = w['rain']['3h'] if 'rain' in w else math.nan
  56
  57     return data
  58
  59
  60 def write_csv(csv_file, weather_data):
  61     """output like wetter.at.pl"""
  62     with open(csv_file, "a", newline="") as file:
  63         writer = csv.writer(file, dialect="excel", delimiter=';')
  64         writer.writerow([
  65             weather_data['date'],
  66             weather_data['time'],
  67             weather_data['sunrise_t'],
  68             weather_data['sunset_t'],
  69             "{:.2f}".format(weather_data['temp']),
  70             "{:.2f} mm/h".format(weather_data['precipitation']),
  71             "{:.1f} km/h {}".format(weather_data['windspeed'], weather_data['winddirection']),
  72             weather_data['weather'],
  73             "{}".format(weather_data['cloudiness'])
  74         ])
  75
  76
  77 def main(configfile):
  78     config = configparser.ConfigParser()
  79     config.read(configfile)
  80     apikey = config.get('openweathermap', 'apikey')
  81     cityid = config.get('openweathermap', 'cityid')
  82     csvfile = config.get("openweathermap", 'csvfilename')
  83
  84     weather_raw = openweathermap_json(apikey, cityid)
  85     if debug:
  86         pprint(weather_raw)
  87     weather = extractweatherdata(weather_raw)
  88     if debug:
  89         pprint(weather)
  90
  91     # TODO:
  92     # write to db
  93
  94     # write to csv
  95     write_csv(os.path.expanduser(csvfile), weather)
  96
  97
  98 if __name__ == '__main__':
  99     default_config_file = os.path.expanduser('~/seewasser.ini')
 100     parser = argparse.ArgumentParser(description='Get OpenWeathermap data')
 101     parser.add_argument('--config', default=default_config_file, help='configuration file')
 102     args = parser.parse_args()
 103     main(args.config)