amomentincrime.py

# -*- coding: utf-8 -*-
import datetime
import decimal
from os import path
import pickle
import re
import requests
import time
from email import utils


class UTC(datetime.tzinfo):
    """UTC"""

    def utcoffset(self, dt):
        return datetime.timedelta(0)

    def tzname(self, dt):
        return "UTC"

    def dst(self, dt):
        return datetime.timedelta(0)


PATTERN = re.compile(r'activos\.\.\.\s+(?P<percent>\d{1,3}\.\d+)')

last_value = 3
last_modified = utils.parsedate_to_datetime('Wed, 24 Aug 2016 19:35:53 GMT')

if path.exists('amomentincrime.dat'):
    last_modified, last_value = pickle.load(open('amomentincrime.dat', 'rb'))

while True:
    response = requests.get('http://amomentincrime.com')
    matches = PATTERN.search(response.text)
    value = decimal.Decimal(matches.group(1))
    if value != last_value:
        modified = utils.parsedate_to_datetime(response.headers['Last-Modified'])
        delta = modified - last_modified
        with open('amomentincrime.log', 'a') as handle:
            handle.write('{}% to {}% in {} seconds\n'.format(last_value,  value, delta.seconds))
        print('Now at {}% after {} seconds at {}%'.format(value, delta.seconds, last_value))
        last_modified = modified
        last_value = value
        with open('amomentincrime.dat', 'wb') as handle:
            pickle.dump((last_modified, last_value), handle)
    else:
        last = datetime.datetime.now(UTC()) - last_modified
        print('Last change was {} seconds ago'.format(last.seconds))
    time.sleep(300)