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