1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
#!/usr/bin/env python3
from dataclasses import dataclass
import datetime
import logging
import os
import urllib.request
import astral # type: ignore
from astral.sun import sun # type: ignore
from bs4 import BeautifulSoup # type: ignore
import pytz
import argparse_utils
import config
import datetime_utils
import dateparse.dateparse_utils as dp
import persistent
import text_utils
logger = logging.getLogger(__name__)
cfg = config.add_commandline_args(
f'Cached Weather Forecast ({__file__})',
'Arguments controlling detailed weather rendering'
)
cfg.add_argument(
'--weather_forecast_cachefile',
type=str,
default=f'{os.environ["HOME"]}/.weather_forecast_cache',
metavar='FILENAME',
help='File in which to cache weather data'
)
cfg.add_argument(
'--weather_forecast_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 WeatherForecast:
date: datetime.date # The date
sunrise: datetime.datetime # Sunrise datetime
sunset: datetime.datetime # Sunset datetime
description: str # Textual description of weather
@persistent.persistent_autoloaded_singleton()
class CachedDetailedWeatherForecast(object):
def __init__(self, forecasts = None):
if forecasts is not None:
self.forecasts = forecasts
return
now = datetime_utils.now_pacific()
self.forecasts = {}
# Ask the raspberry pi about the outside temperature.
www = urllib.request.urlopen(
"http://10.0.0.75/~pi/outside_temp"
)
current_temp = www.read().decode("utf-8")
current_temp = float(current_temp)
current_temp *= (9/5)
current_temp += 32.0
current_temp = round(current_temp)
www.close()
# Get a weather forecast for Bellevue.
www = urllib.request.urlopen(
"https://forecast.weather.gov/MapClick.php?lat=47.652775&lon=-122.170716"
)
forecast_response = www.read()
www.close()
soup = BeautifulSoup(forecast_response, "html.parser")
forecast = soup.find(id='detailed-forecast-body')
parser = dp.DateParser()
said_temp = False
last_dt = now
dt = now
for (day, txt) in zip(
forecast.find_all('b'),
forecast.find_all(class_='col-sm-10 forecast-text')
):
last_dt = dt
try:
dt = parser.parse(day.get_text())
except Exception:
dt = last_dt
assert dt is not None
# Compute sunrise/sunset times on dt.
city = astral.LocationInfo(
"Bellevue", "USA", "US/Pacific", 47.653, -122.171
)
s = sun(city.observer, date=dt, tzinfo=pytz.timezone("US/Pacific"))
sunrise = s['sunrise']
sunset = s['sunset']
if dt.date() == now.date() and not said_temp:
blurb = f'{day.get_text()}: The current outside tempterature is {current_temp}. '
blurb += txt.get_text()
said_temp = True
else:
blurb = f'{day.get_text()}: {txt.get_text()}'
blurb = text_utils.wrap_string(blurb, 80)
if dt.date() in self.forecasts:
self.forecasts[dt.date()].description += '\n' + blurb
else:
self.forecasts[dt.date()] = WeatherForecast(
date = dt,
sunrise = sunrise,
sunset = sunset,
description = blurb,
)
@classmethod
def load(cls):
if persistent.was_file_written_within_n_seconds(
config.config['weather_forecast_cachefile'],
config.config['weather_forecast_stalest_acceptable'].total_seconds(),
):
import pickle
with open(config.config['weather_forecast_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_forecast_cachefile'], 'wb') as wf:
pickle.dump(
self.forecasts,
wf,
pickle.HIGHEST_PROTOCOL,
)
|
