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#!/usr/bin/env python3
from dataclasses import dataclass
import datetime
import json
import os
from typing import List
import urllib.request
import argparse_utils
import config
import datetime_utils
import list_utils
import persistent
cfg = config.add_commandline_args(
f'Cached Weather Data List ({__file__})',
'Arguments controlling cached weather data',
)
cfg.add_argument(
'--weather_data_cachefile',
type=str,
default=f'{os.environ["HOME"]}/.weather_summary_cache',
metavar='FILENAME',
help='File in which to cache weather data'
)
cfg.add_argument(
'--weather_data_stalest_acceptable',
type=argparse_utils.valid_duration,
default=datetime.timedelta(seconds=7200), # 2 hours
metavar='DURATION',
help='Maximum acceptable age of cached data. If zero, forces a refetch'
)
@dataclass
class WeatherData:
date: datetime.date # The date
high: float # The predicted high in F
low: float # The predicted low in F
conditions: List[str] # Conditions per ~3h window
most_common_condition: str # The most common condition
icon: str # An icon to represent it
@persistent.persistent_autoloaded_singleton()
class CachedWeatherData(persistent.Persistent):
def __init__(self,
weather_data = None):
if weather_data is not None:
self.weather_data = weather_data
return
self.weather_data = {}
icon_by_condition = {
"Thunderstorm": "⚡",
"Drizzle": "",
"Rain": "☂️",
"Snow": "❄️",
"Clear": "☀️",
"Clouds": "⛅",
"Mist": "🌫",
"Smoke": "🚬",
"Haze": "🌥️",
"Dust": "💨",
"Fog": "🌁",
"Sand": "🏜️",
"Ash": "🌋",
"Squall": "🌬",
"Tornado": "🌪️"
}
now = datetime.datetime.now()
dates = set()
highs = {}
lows = {}
conditions = {}
param = "id=5786882" # Bellevue, WA
key = "c0b160c49743622f62a9cd3cda0270b3"
www = urllib.request.urlopen(
f'http://api.openweathermap.org/data/2.5/weather?zip=98005,us&APPID={key}&units=imperial'
)
response = www.read()
www.close()
parsed_json = json.loads(response)
dt = datetime.datetime.fromtimestamp(parsed_json["dt"]).date()
dates.add(dt)
condition = parsed_json["weather"][0]["main"]
icon = icon_by_condition.get(condition, '?')
if dt == now.date() and now.hour > 18 and condition == 'Clear':
icon = '🌙'
self.weather_data[dt] = WeatherData(
date = dt,
high = float(parsed_json["main"]["temp_max"]),
low = float(parsed_json["main"]["temp_min"]),
conditions = [condition],
most_common_condition = condition,
icon = icon,
)
www = urllib.request.urlopen(
f"http://api.openweathermap.org/data/2.5/forecast?{param}&APPID={key}&units=imperial"
)
response = www.read()
www.close()
parsed_json = json.loads(response)
count = parsed_json["cnt"]
for x in range(count):
data = parsed_json["list"][x]
dt = datetime.datetime.strptime(data['dt_txt'], '%Y-%m-%d %H:%M:%S')
dt = dt.date()
dates.add(dt)
if dt not in highs:
highs[dt] = None
lows[dt] = None
conditions[dt] = []
temp = data["main"]["temp"]
if highs[dt] is None or temp > highs[dt]:
highs[dt] = temp
if lows[dt] is None or temp < lows[dt]:
lows[dt] = temp
cond = data["weather"][0]["main"]
conditions[dt].append(cond)
today = datetime_utils.now_pacific().date()
for dt in sorted(dates):
if dt == today:
high = highs.get(dt, None)
if (
high is not None and
self.weather_data[today].high < high
):
self.weather_data[today].high = high
continue
most_common_condition = list_utils.most_common_item(conditions[dt])
icon = icon_by_condition.get(most_common_condition, '?')
if dt == now.date() and now.hour > 18 and condition == 'Clear':
icon = '🌙'
self.weather_data[dt] = WeatherData(
date = dt,
high = highs[dt],
low = lows[dt],
conditions = conditions[dt],
most_common_condition = most_common_condition,
icon = icon
)
@classmethod
def load(cls):
if persistent.was_file_written_within_n_seconds(
config.config['weather_data_cachefile'],
config.config['weather_data_stalest_acceptable'].total_seconds(),
):
import pickle
with open(config.config['weather_data_cachefile'], 'rb') as rf:
weather_data = pickle.load(rf)
return cls(weather_data)
return None
def save(self):
import pickle
with open(config.config['weather_data_cachefile'], 'wb') as wf:
pickle.dump(
self.weather_data,
wf,
pickle.HIGHEST_PROTOCOL,
)
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