python-ote 0.2.1

Python library for scraping daily electricity prices from OTE (ote-cr.cz)

python-ote

Electricity prices scraper for OTE (ote-cr.cz)

Install

pip install python-ote

In order to parse numbers corrently (Czech notation - e.g. 1,000,000) this package needs the cs_CZ.UTF-8 system locale. If the OS doesn't have it by default the following commands can be used generate it:

echo "cs_CZ.UTF-8 UTF-8" >> /etc/locale.gen
locale-gen

Usage

from ote import Ote
from dateutil import parser

# Create client
ote = Ote()

Use getDayMarketPrices(date_from, date_to) method to get electricity prices for the given time range. It accepts a date_from and optionally a date_to, both of which have to be a datetime.date object. If date_to is not specified the method returns data to today.

Examples:

# Get water consumption data from the specified date to now.
date_from = parser.parse('2020-08-01').date()
deferred_data = ote.getDayMarketPrices(date_from);

# Get water consumption data for a date interval
date_from = parser.parse('2020-08-01').date()
date_to = parser.parse('2020-08-11').date()
deferred_data = ote.getDayMarketPrices(date_from, date_to);

# Get water consumption data for a specific date (just 1 day)
date = parser.parse('2020-08-01').date()
deferred_data = ote.getDayMarketPrices(date, date);

You may call getDayMarketPrices multiple times with different parameters. It returns a twisted.internet.defer.Deferred object that can be used to retrieve the price data in the future using a callback you need to provide.

def process_prices(prices)
  print(prices)

deferred_data.addCallback(process_prices)

If you have multiple Deferreds from multiple calls to getDayMarketPrices you can use Ote.join() to get a Deferred that will be resolved after all crawlers are finished.

The last callback should stop the reactor so it's shut down cleanly. Reactor should be stopped after all crawlers are done so the join() method comes in handy. Note that the reactor cannot be restarted so make sure this is the last thing you do:

from twisted.internet import reactor

d = ote.join()
d.addBoth(lambda _: reactor.stop())

The last thing you need to do is run the reactor. The script will block until the crawling is finished and all configured callbacks executed.

reactor.run(installSignalHandlers=False)

This might look a bit daunting so please see test.py for a complete example.

Keep in mind the library is using Scrapy internally which means it is scraping the OTE website. If OTE comes to think you are abusing the website they may block your IP address.

License

See LICENSE.