012

012/requirements.txt

@@ -0,0 +1,2 @@
+pytz==2017.2
+requests==2.13.0

012/weather.py

@@ -0,0 +1,55 @@
+from datetime import datetime
+import os
+
+import pytz
+import requests
+
+API_KEY = os.environ.get('WEATHER_API')
+BASE_URL = 'http://api.openweathermap.org/data/2.5/weather?q='
+
+TIMEZONES = {
+    'Sydney': 'Australia/Sydney',
+    'Alicante': 'Europe/Madrid',
+}
+
+# API docs: http://openweathermap.org/current
+URL = ('http://api.openweathermap.org/data/2.5/weather?'
+       'q={}&mode=json&units=metric&appid={}')
+
+
+def get_weather(cities=TIMEZONES.keys()):
+    fmt = 'In {} the weather is: {}, today sun rises at {} and sets at {}'
+
+    output = []
+    for city in cities:
+        resp = requests.get(URL.format(city, API_KEY))
+        info = resp.json()
+        main = info["weather"][0]["main"]
+        sunrise = get_local_tstamp(city, info["sys"]["sunrise"])
+        sunset = get_local_tstamp(city, info["sys"]["sunset"])
+        output.append(fmt.format(city, main, sunrise, sunset))
+
+    return '\n'.join(output)
+
+
+def get_local_tstamp(city, utstamp):
+    if city not in TIMEZONES:
+        raise ValueError('Not a valid city, check what you call me with')
+    tz = TIMEZONES[city]
+
+    try:
+        utstamp = int(utstamp)
+    except ValueError:
+        raise
+
+    # http://stackoverflow.com/questions/12978391/localizing-epoch-time-with-pytz-in-python
+    utc_dt = datetime.utcfromtimestamp(utstamp).replace(tzinfo=pytz.utc)
+    loc_tz = pytz.timezone(tz)
+    dt = utc_dt.astimezone(loc_tz)
+
+    fmt = '%H:%M:%S %Z%z'
+    return dt.strftime(fmt)
+
+
+if __name__ == '__main__':
+    print(get_weather())

LOG.md

@@ -13,7 +13,7 @@
 | 009 | Apr 07, 2017 | [interactive script to create a new Pelican blog article](009) | lot of known concepts, but nice to bring a lot of functionality together, and above all a really useful script for our blog |
 | 010 | Apr 08, 2017 | [script to spot cheap @transavia flights using their #API](010) | this was a nice exercise, and a very useful script for a monitoring cron job. TODO: wrap it in a Flask web app. Some modules I explored: calendar, datetime, dateutil.relativedelta, requests_cache |
 | 011 | Apr 09, 2017 | [generic script to email the contents of a text file](011) | a script that uses your gmail account to email the contents of a text file. Current use case is to email web scraped data. smtplib, email, MIME |
-| 012 | Apr 10, 2017 | [TITLE](012) | LEARNING |
+| 012 | Apr 10, 2017 | [using OpenWeatherMap #API to compare weather in Australia vs Spain](012) | OpenWeatherMap API, pytz for timezone handling, datetime.utcfromtimestamp to parse unix timestamp to datetime, Google confirms sunset / sunrise times correct :) |
 | 013 | Apr 11, 2017 | [TITLE](013) | LEARNING |
 | 014 | Apr 12, 2017 | [TITLE](014) | LEARNING |
 | 015 | Apr 13, 2017 | [TITLE](015) | LEARNING |