How to Build a Competitor Price Intelligence Tool

Price intelligence is one of the most valuable applications of web scraping. E-commerce companies use automated price tracking to stay competitive. Architecture Overview Our tool will: Scrape competitor product pages on a schedule Store price history in SQLite Detect price changes and generate alerts The Price Scraper Class import requests from bs4 import BeautifulSoup import sqlite3 class PriceScraper : def __init__ ( self , db_path = " prices.db " ): self . db_path = db_path self . session = requests . Session () self . session . headers . update ({ " User-Agent " : " Mozilla/5.0 " }) self . _init_db () def _init_db ( self ): conn = sqlite3 . connect ( self . db_path ) conn . execute ( """ CREATE TABLE IF NOT EXISTS prices ( id INTEGER PRIMARY KEY AUTOINCREMENT, product_id TEXT, competitor TEXT, product_name TEXT, price REAL, url TEXT, scraped_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ) """ ) conn . commit () conn . close () def scrape_price ( self , url , selectors ): try : response =