72 lines
1.6 KiB
Python
Executable File
72 lines
1.6 KiB
Python
Executable File
#!/usr/bin/env python3
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"""
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Read weather predictions for the next days, and if it's high enough,
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recommend that Dennis buys witbier.
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"""
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import datetime
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import json
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import os
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import textwrap
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import sys
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from collections import defaultdict
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from urllib.request import urlopen
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def load_weather():
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url = 'https://api.openweathermap.org/data/2.5/forecast?q=Leiden' \
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+ '&units=metric' \
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+ '&appid=' + os.environ['API_KEY']
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result = urlopen(url)
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return json.load(result)
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def get_maxima(weather):
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days = defaultdict(float)
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for day in weather['list']:
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instant = datetime.datetime.fromtimestamp(day['dt'])
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date = instant.date()
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days[date] = max(days[date], day['main']['temp_max'])
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return days
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def notify(best_day, best_temp):
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best_day = best_day.strftime('%d/%m')
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message = f'''\
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Lief DB,
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De komende dagen wordt het wederom prachtig weer. Zo wordt het
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op {best_day} maar liefst {best_temp} °C!
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Met zulke mooie berichten kan het niet anders dan dat er
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binnenkort witbier verkocht wordt. Toch? Ik kijk er in ieder
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geval naar uit.
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Knuffels,
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Witbierbot.
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'''
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message = textwrap.dedent(message)
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print(message)
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def main():
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if len(sys.argv) > 1:
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with open(sys.argv[1]) as f:
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weather = json.load(f)
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else:
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weather = load_weather()
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maxima = get_maxima(weather)
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best, temp = max(maxima.items(), key=lambda x: x[1])
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if temp > 10:
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notify(best, temp)
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if __name__ == '__main__':
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main()
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