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#!/usr/bin/env python3
from argparse import ArgumentParser
import requests
import fscache
base_url = 'https://api.weather.gov'
headers = {
'user-agent': 'meteor.py/0.2 (us@starfall.systems)',
'accept': 'application/ld+json'
}
# SGR decorations / ANSI escape colors
class term:
RESET = '\033[0m'
BOLD = '\033[1m'
def handle_args():
parser = ArgumentParser()
parser.add_argument('lat', help='latitude')
parser.add_argument('lon', help='longitude')
return parser.parse_args()
def print_alerts(county, zone):
# in some areas, alerts are not published for the zone but only for the county
# you can request both like this rather than making two requestsfork
alerts = requests.get(base_url + f'/alerts/active?zone={county},{zone}',
headers=headers).json()
print(f'{term.BOLD}{alerts.get("title")}')
print(f'===================={term.RESET}')
for alert in alerts.get('@graph'):
print(f'{alert.get("headline")}')
print(f' {alert.get("severity")} - {alert.get("certainty")} - {alert.get("urgency")}')
print(f' Until: {alert.get("expires")}')
print(f'{alert.get("description")}')
print('--------------------')
# many more cool fields available.
# verious datetimes: sent, effective, onset, expires, ends
# severity: Minor, Moderate, Severe, Extreme, Unknown
# certainty: Unlikely, Possible, Likely, Observed, Unknown
# urgency: Past, Future, Expected, Immediate, Unknown
# messageType: Alert, Update
# can construct the headline ourseves as f'{event} issued {sent} [until {end}] by {senderName}'
print()
def print_forecast(point):
cache_key = f'{point.get("gridId")}-{point.get("gridX")},{point.get("gridY")}'
try:
print(cache.read(cache_key))
except fscache.CacheMiss:
response = requests.get(point.get('forecast'), headers=headers)
# ugly cache_control parsing honestly, break out later
ttl = int(response.headers['cache-control'].split('max-age=')[-1].split(',')[0])
forecast = response.json()
buffer = f'{term.BOLD}forecast for {point.get("relativeLocation").get("city")}, {point.get("relativeLocation").get("state")} ({cache_key})'
buffer += '\n' + f'===================={term.RESET}'
periods = forecast.get('periods')
# print today and tonight in long format
for period in periods[:2]:
buffer += '\n' + f'{term.BOLD}{period.get("name")}{term.RESET}:'
buffer += '\n' + f' {period.get("temperature")}°{period.get("temperatureUnit")}, wind {period.get("windSpeed")} {period.get("windDirection")}'
buffer += '\n' + f' {period.get("detailedForecast")}'
# print further forecasted periods in short format
for period in periods[2:]:
buffer += '\n' + f'{term.BOLD}{period.get("name").ljust(15)}{term.RESET}: {period.get("shortForecast")} - {period.get("temperature")}°{period.get("temperatureUnit")}, {period.get("windSpeed")} {period.get("windDirection")}'
cache.write(cache_key, buffer, ttl)
print(buffer)
def main():
args = handle_args()
global cache
cache = fscache.Cache('meteor.py')
point = requests.get(base_url + f'/points/{args.lat},{args.lon}',
headers=headers).json()
county = point.get('county').split('/')[-1]
zone = point.get('forecastZone').split('/')[-1]
print_alerts(county, zone)
# TODO can hazardous weather outlook be gotten programatically?
print_forecast(point)
if __name__ == '__main__':
import sys
sys.exit(main())
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