Vampire

Vampire looks for blood in the Czech transfusion centers!

This program scrapes the webs of Czech transfusion centers and hospitals and extracts information about the amount of available blood. Intended to provide data for the map at https://darujukrev.cz.

NOTE: This program will break if the scraped web pages are modified in an unexpected way. Therefore, it must be continually maintained.

Scrape to CSV

To scrape the blood status into CSV, run:

python3 -m vampire

It will print the results in CSV (with a header) to stdout.

Scrape to a Google Sheet

To scrape the blood status into a Google Sheet, you will need to prepare two config files:

• secret/service_account.json: private key and other information about a "service account" for a Google application with access to the Sheets API. This can be generated from the Google Developer Console.
• secret/spreadsheet.json: a JSON file which identifies the target spreadsheet. It must define spreadsheet_id (identifier of the spreadsheet) and sheet_id (name of the sheet).

The spreadsheet must have a header which corresponds to the CSV header. The columns can be specified in any order.

The scraper can then be run as follows:

python3 -m vampire.update_sheet

It will update any existing rows in the sheet and add any new rows. Rows that were not scraped correctly are not modified.

Use as a library

import vampire
site_statuses = vampire.scrape_sites()

The output of scrape_sites() is a list of vampire.SiteStatus (see vampire/data.py for a definition).

When an error occurs during scraping (for example, if the layout of the scraped web page has changed), the exception is logged, but other sites will still be returned. You can pass a custom logger to scrape_sites() using a keyword argument logger.

The library uses asyncio and httpx to scrape all sites in parallel. When used from async code, you may want to use vampire.async_scrape_sites(), which is async version of vampire.scrape_sites().

---

This software is released into public domain (see UNLICENSE for the legalese).