Comparing prices is easy once you know two listings are the same product. A five-stage matching cascade, GTIN validation code, and what academic benchmarks say about accuracy.
Tag Archives: Python
Before you write a single CSS selector, search the page source for the price. We checked where five big US retailers keep it, and why the first price you find is often the wrong one.
Most Shopify stores publish their whole catalog at /products.json. We tested 68 brand domains to measure what the endpoint really returns, where it stops, and how naive scrapers lose data.


