Amazon Scrapy, This Scrapy project contains 3 seperate spiders: The following articles go through in detail how the After trying several approaches, I built a solution using Scrapy and ScrapeOps that’s both robust and maintainable. Scrapy the detail and lowest price of amazon best seller product by python spider - dynamohuang/amazon-scrapy Nessa aula eu vou te dar uma introdução sobre webscraping no Python com Scrapy para que você possa obter dados da web automaticamente! python爬亚马逊数据 scrapy 亚马逊,爬虫框架之Scrapy一、介绍二、安装三、命令行工具四、项目结构以及爬虫应用简介五、Spiders六、Selectors七、Items八 … If you are scraping amazon search results page,e. - kardoso/Amazon-Scrapy Decodo / python-scrapy-amazon Public Notifications You must be signed in to change notification settings Fork 2 Star 4 Welcome to the Amazon Scrapy Selenium Crawl Bot, your go-to solution for effortlessly gathering discount product data from Amazon and seamlessly organizing it into a … Whenever I want to scraping on amazon. Feel free … Scrapy Coco is a B2B SaaS solution for Amazon Sellers and Agencies. Amazon S3 storage If botocore >= 1. com Return Policy: Amazon. … Learn web scraping with an Amazon Case Study, including practical recommendations and how to proceed, in exactly 1h !! - Free Course The Messy Beginning Like many developers, I started Amazon scraping with a single Python Tagged with webscraping, scrapy, scrapeops, python. This project can be used to get Amazon location cookies from specific Amazon zip-code and country-specific domains like . Additionally, learn more about … Learn how to scrape Amazon search result data using Python in this 2025 guide. I'm working on a pet project of mine that will help me … Exporting to Amazon S3 with Scrapy # To configure a Scrapy project or spider to export scraped data to Amazon S3: Install boto3: pip install boto3 If you are using Scrapy Cloud, remember to … 它是一个功能强大的Python框架,用于以非常灵活的方式从任何网站提取数据。它使用 Xpath 来搜索和提取数据。它很轻量 … Are you looking for a method of scraping Amazon reviews and do not know where to begin with? In that case, you may find this blog very useful in scraping Amazon … Web scraping is a powerful method used to automatically collect and extract data from websites. Are you looking for a method of scraping Amazon reviews and do not know where to begin with? In that case, you may find … Learn how to scrape Amazon. Includes code for WAF … GitHub is where people build software. … Build a Python Scrapy spider to scrape Amazon reviews - extract ratings, review text, dates, helpful votes, and bypass anti-bot protection with proxy … Compre online WEBSITE SCRAPING WITH PYTHON: USING BEAUTIFULSOUP AND SCRAPY [Paperback] Hajba, de Gábor László Hajba na Amazon. Because Product information changes according to location in amazon. We will begin with simple examples and move on to relatively … GitHub is where people build software. g. Amazon has a Product API or you can use one the Amazon API wrapper modules such as Amazon Simple Product API or Amazon Product Advertising API 5. …. Scrape Amazon search result pages and product details at scale using Scrapy & ScrapeOps. com's product and review data using Python and how to avoid blocking and solve common … In today's data-driven world, scraping Amazon product data has become a crucial skill for developers, especially those working in … Web Scraping Practical with Python: Crawling with Scrapy, Beautiful Soup, Selenium and more. 🎁 Scrapy is a fast high-level screen scraping and web crawling framework, used to crawl websites and extract structured data from their pages. Click Scraping API > select Amazon to enter the Amazon scraping page. - srang992/Amazon-Prime-Video … Rely on Scrapy middleware to filter requests Preventing Scrapy from going off the rails and crawling unnecessary pages was a bigger part of the challenge than I expected. result = callback … Bright Data is designed to emulate real users, making it highly effective for scraping Amazon. Contribute to archi-007/scrapy-amazon development by creating an account on GitHub. … Compre online Website Scraping with Python: Using BeautifulSoup and Scrapy, de Hajba, Gábor László na Amazon. *FREE* shipping on qualifying offers. in The entire site and not just parts of it. (English Edition) Edição Inglêspor Adam Barone 4,8(5) eBook Kindle Preço, página do … Compre online Learning Scrapy, de Kouzis - Loukas, Dimitris na Amazon. Encontre diversos livros escritos por Kouzis - … In this tutorial, we have used Scrapy and python. Scraper API has a free plan that allows you to make up to 1,000 requests per month which makes it ideal … Contribute to ai-to-ai/amazon-scrapy development by creating an account on GitHub. Save money with Scrapy! Scrapy middleware module which uses image parsing to submit a captcha response to amazon. - akshay20t/Amazon-Scrapy A simple Crawler to crawl amazon and save product name, rating, comments and price to JSON/CSV. TL;DR For those who just want the final result Product Pages — 224,671 Products — 6. ⚙️ Extracts product titles, prices, ratings, and images — all with a modern CLI, banner, and warning … In this last video we will scrap the rest of the pages of amazon. The bot just scrape data which… Learn how to scrape the web using Python Beautiful Soup. 3k次,点赞4次,收藏10次。这篇文章介绍了Scrapy-Amazon,一个基于Scrapy的Python库,专为高效、安全地从亚马逊获取商品信息而设计。它 … Web Scraper made using Python, Scrapy and Selenium to scrape the movies and tv shows from the Amazon Prime Video website. However, although I imitate cookies and headers as in the browser, amazon. Key … Amazon Scraping with Scrapy Framework. Best practices, extension highlights … 文章浏览阅读2. com for products and scrape Amazon product pages. - jalonzou/AmazonImageScraper A Scrapy spider to scrape Amazon UK product details based on search terms, categories, and filters. Contribute to downdawn/amazon_spider development by creating an account on GitHub. MySQL backend and run your code under … Amazon. Amazon Product Page Scraper amazon. " "With … I am new to scrapy and I'm trying to scrape amazon. Get instant price drop alerts, view historical price charts, and set up price watches for your favourite products. To use the active connection mode instead, set the FEED_STORAGE_FTP_ACTIVE setting to True. Frete GRÁTIS em milhares de … Compre Website Scraping with Python: Using BeautifulSoup and Scrapy (English Edition) de Hajba, Gábor László na Amazon. … Já imaginou? A vida seria mais fácil se houvesse maneiras de saber o desempenho do seu produto e o que as pessoas sentem sobre o seu produto? A Solução - Técnicas de Mineração … Learn how to scrape Amazon reviews in 2025 with our step-by-step guide. py file. Introdução ao Scrapy: Por que usar Scrapy em projetos de Python? O Scrapy é um framework de aplicação de alta qualidade para a raspagem de dados na web e crawling, escrito em Python. We have seen how to inspect a page, how to select elements using XPath, … Compre online Web Scraping Com Python: Coletando Mais Dados Da Web Moderna, de Mitchell, Ryan na Amazon. File "/home/john/anaconda2/envs/amazon-scrapy/lib/python3. items import AmazonLoginItem from scrapy. More than 150 million people use GitHub to discover, fork, and contribute to over 420 … Compre Scrapy Tutorial: Scraping data from Reddit (English Edition) de Pham, Tan na Amazon. com does not … Folders and files Repository files navigation quick-amazon-scrapy A quick reference to start new scrapy projects install scrapy Integrate Amazon with ScrapeNinja using n8n. Scrapy provides this functionality out of the box with the Feed Exports, which allows you to generate feeds with the scraped items, using multiple serialization formats and storage backends. Their … Check this tutorial and learn how to scrape Amazon product reviews by building a scraper or using an automated solution. Contribute to sijanonly/amazonscrapy development by creating an account on GitHub. Web Scraping Amazon for web scraping books - Build An Amazon Scraper With Python -A complete Scrapy spider, where I show how to get all of … However, scraping Amazon’s search results at scale is a challenging feat, mainly due to the vast data, intricate web layouts, rate limitations, … Hi, I am running an Amazon FBA business. com FREE DELIVERY and Returns possible on eligible purchases To use the active connection mode instead, set the FEED_STORAGE_FTP_ACTIVE setting to True. 87 is installed, FILES_STORE and … A comprehensive set of Jupyter notebooks for scraping data from Amazon. br - uelintomsilva/amazon-scrapy Extract The Information from amazon Product pages and for particular zipcodes - 9898-D/Amazon-Scrapy-Multiple-zipcode Learn to scrape Amazon product reviews using SelectorLib by building a Python scraper for insightful data extraction. The Amazon Scraper automates the process of gathering and comparing prices for CPU, GPU, and RAM products from Amazon. Thankyou for joining me in this video series :) more import scrapy from scrapy. com This changing information is as … Web Scraping Amazon With Using Scrapy CrawlSpider — okey proxy What is Scrapy CrawlSpider? CrawlSpider is a derived … 但目前Scrapy的用途十分广泛,可用于如数据挖掘、监测和自动化测试等领域,也可以应用在获取API所返回的数据 (例如 Amazon Associates Web Services ) 或者通用 … Learn what Amazon ASIN is and how to build a fast and scalable Amazon ASIN scraper. Markdown syntax guide Headers This is a Heading h1 This is a Heading h2 This is a Heading h6 Emphasis This text will be italic This will also be … Compre online Scrapy: APIs for Virtually Everything Through Python Automation, de Kouzis-Loukas, Dimitrios na Amazon. Each crawled item goes through two pipelines. de seller details. Full article at ScrapeHero Tutorials There are two simple scrapers in this project. Encontre … To get started with Scrapy, you will first need to install it using the methods provided in its documentation. So That's why I need to scraping with scrapy or requests. com using the requests and … Tutorial on how to scrape Amazon. Confira também os eBooks mais vendidos, … Scrapy the detail and lowest price of amazon best seller product by python spider - dynamohuang/amazon-scrapy How To Scrape With Scrapy Series How To Build A Amazon. It can be used for a wide range of purposes, from … Below is the code and output. I am … Track prices from major South African stores. … ¿Quieres aprender a extraer datos de Amazon de manera eficiente? En este tutorial te muestro paso a paso cómo utilizar Python y la poderosa biblioteca Scrapy Integrate Amazon with HasData using n8n. With thousands of companies offering products and price monitoring solutions for Amazon, scraping Tagged with webscraping, … But Amazon somehow is still able to recognize me and block my request after 50 or so. More than 150 million people use GitHub to discover, fork, and contribute to over 420 … 基于scrapy的amazon爬虫. 4. com sure! scraping amazon products using python scrapy is a powerful way to extract product information such as prices, Uso do Framework Scrapy para coleta de dados na amazon. com Voluntary 30 … Scrapy the detail and lowest price of amazon best seller product by python spider - dynamohuang/amazon-scrapy Amazon. uk, etc. Contribute to amalaj7/Amazon-Scrapy development by creating an account on GitHub. com/questions/70444479/scrapy-not-able-to … Focusing on BeautifulSoup4 and Scrapy, this concise, focused book highlights common problems and suggests solutions that readers can implement on their own. Extract contacts, ratings, and insights to track sellers and improve eCommerce strategies. A robust Amazon web scraper built with Scrapy and Selenium WebDriver, designed for extracting product listings dynamically rendered on Amazon’s search pages. com without getting blocked. response import … Gostaríamos de exibir a descriçãoaqui, mas o site que você está não nos permite. The node uses Puppeteer for … In this tutorial, we'll demonstrate how to collect Amazon ASIN (Standard Identification Number) data for free. Clique aqui para fazer download deste livro, ler … Welcome to this detailed tutorial on how to scrape Amazon. Question is, has anyone here successfully scrapped Amazon at a large scale and how did you do it? Crawling amazon. It can be used for a wide range of purposes, from … Scrape Amazon Reviews using Python Web scraping is one of the best ways to automate collecting a large set of data according to our needs. 3k次,点赞5次,收藏11次。本项目是基于Python的Scrapy框架开发的一个亚马逊产品数据抓取工具。它包括了几个独立的蜘蛛(spiders),能够执行不 … Amazon Review Scraper using Selectorlib A simple amazon scraper to extract product details and prices from Amazon. I tried this code but I'm getting an error. Discover step-by-step methods, best practices, … 文章浏览阅读1. … Amazon, as the largest e-commerce corporation in the United States, offers the widest range of products in the world. com Product Scraper With Python Scrapy [2025] Learn how to build a Python Scrapy … Develop crawlers with the Scrapy framework Learn methods to store data you scrape Read and extract data from documents … Fastest and powerful Amazon product scraper tool that extracts detailed product information from Amazon product pages, including title, price, features, How I built a production-ready Amazon scraper that handles 1000+ products with proxy rotation and monitoring If you are interested in serverless architecture, you may have read many contradictory articles and wonder if serverless … 探索Python跨境电商爬虫完整指南:从Scrapy框架搭建到亚马逊/沃尔玛数据采集/抓取全流程,掌握反爬攻克技巧与Pangolin … Amazon Scrapy Product Data Scraper This project provides a Python-based solution for scraping detailed product data from Amazon product pages. Step 3. By running the scraper daily, it provides up-to-date price … Download the latest stable release of Scrapy and start your web scraping journey today Scraping Amazon. Scrapy with Proxies: Scrapy is a … This article will explore using Scrapy, a popular web scraping framework, with AWS Lambda, a serverless computing platform … The goal of this project is trying to get a list of all laptop products appearing on the amazon e-commerce webpage, and then sequentially scrape details about the … Read this guide with actual code samples to build an Amazon web scraper from scratch. Encontre … Step 2. This tool uses Scrapy for … web scraping data from amazon using scrapy. py in … Compre Mastering Web Scraping with Scrapy: Comprehensive Guide with Use Cases and Code Examples (English Edition) de Martins, Pedro na Amazon. Confira também os eBooks mais vendidos, lançamentos e livros digitais … Compre online Website Scraping with Python: Using Beautifulsoup and Scrapy, de Hajba, Gábor László na Amazon. Extract product URLs, titles, prices, ratings, and detailed product … Tutorial on web scraping with scrapy and Python through a real world example project. The objective was to extract comprehensive information about each product listed on the website for further … A Web scraper application that is used for price drop alerts. It crawls items on Amazon (e. Confira também os eBooks … What is Amazon Product Data Scraping? Amazon product data scraping involves extracting information such as product … Master techniques to bypass Amazon CAPTCHA for web scraping in 2025. It will be very helpful when you are … Spider Code In this example the below code defines a web scraper using Scrapy to extract information (product name and price) … anuragrana / scrapy-amazon-books Public Notifications You must be signed in to change notification settings Fork 9 Star 13 Amazon scraper to extract reviews from Amazon products. com. Discover tools, techniques, and best practices for … Ever wondered how to extract Amazon product data efficiently? Watch this video and learn! Or, discover hassle-free scraping with E-Commerce Scraper API free Learn how to scrape product details, titles, prices, images and links from Amazon using Scrapy in Python. co. Clique aqui para fazer download deste livro, ler … Baixar PDF de 'Web Scraping com Python: Coletando mais dados da web moderna - Ryan Mitchell'. Python Scrapy spiders that scrape product data and reviews from Amazon. http import FormRequest from . I have provided the code as 🕵️♂️ A colorful, ethical Amazon web scraper built with Scrapy + Playwright. com using scrapy framework to scrape product details like ASIN, title, price, description, images, etc. A scraper based on Scrapy that helps you scrape item images from Amazon. br. 6/site-packages/twisted/internet/defer. in for details about different laptops. de, . 0 wrapper for Python. com: Mr. Hi @dynamohuang I am new to python scrapy and mysql anyway. this , then amazon only requires you have a user-agent set, and don't scrape too aggressively (i. Even though Scrapy was originally designed for web scraping, it can also be used to extract data using APIs (such as Amazon Associates Web Services) or as a general … Learning Scrapy: Learn the art of effi cient web scraping and crawling with Python [Kouzis-Loukas, Dimitrios] on Amazon. In this blog, we have used Python to scrape amazon data. Tailor searches … Discover a comprehensive guide on web scraping Amazon product data using Scrapy. Features deduplication filter for unique listings and optional … Amazon Product Scraper with Scrapy & ScrapeOps Proxy | Extract titles, prices, ratings & URLs from Amazon search results. - jelonmusk/amazon-scrapy Learn to scrape Amazon using Python with BeautifulSoup and Playwright. Select the URL corresponding to the crawled page. The software automates organic keyword ranking tracking (SERP) on all Amazon marketplaces. Follow this step-by-step guide to gather product details, prices, and … How to Scrape Amazon using Scrapy | Python StudyGyaan 14. com, I fail. The dataset contains 946 books obtained from scraping Amazon books related to data science, statistics, … This is a custom n8n node that allows you to search for products on Amazon across different regions and get structured data in response. Scrappy MST-10 Disposer Tool, Cutlery Guard, Plunger, Scraper, Stopper , White : AppliancesAmazon. Scrapy, a popular data scraping library in… Contribute to grincodes/amazon-scrapy development by creating an account on GitHub. The … This project focused on scraping products data from the Amazon website. Features deduplication filter for unique listings and optional … Get Detail Book Links Create a new project call amazon scrapy startproject amazon Change current directory to amazon folder … Learn how to build a Python Scrapy spider that will crawl Amazon. In this Python Web Scraping Tutorial, we will outline everything needed to get started with web scraping. it will block/rate … In this video, we look at how you can scrape reviews from Amazon products using Python Scrapy. It uses Zyte Smart Proxy Manager as proxy service. Hello 👋 Following one of my Puppeteer tutorials, I’ve created an automation for scraping Amazon products with n8n. - ziplokk1/scrapy-amazon-robot … A cool scrapy spider that is used to notify the price drop in a product that you crave to buy! Tracks availability and price of an amazon product of your wish. It uses Scrapy to … Amazon-scrapy This is a simple price tracker app using python that regularly compares the prices of your favorite stuff on amazon and sends you a customized notification … This Amazon spider uses Scraper API as the proxy solution. com … Contribute to derekCRO/amazon-scrapy development by creating an account on GitHub. com Product Scraper With Python Scrapy [2023] Learn how to build a Python Scrapy … Compre online Python网络爬虫框架Scrapy从入门到精通 张颖, de 张颖 na Amazon. - ygogia/Amazon-Scrapy-Crawler Amazon scrapping I tried to srcape amazon using scrapy following YouTube video using proxy pool and scrapy user agent libraries but the code finishes after crawling 10 pages, it should … Contribute to python-scrapy-playbook/amazon-python-scrapy-scraper development by creating an account on GitHub. Scrapy Coco überwacht automatisch die Position deiner Produkte für deine wichtigsten Keywords, damit du dich auf dein Wachstum konzentrieren kannst. com: Scrappy Little Nobody: 9781471156830: Anna Kendrick: BooksBorn and raised in Portland, Maine, Anna Kendrick made … Amazon Scrapy Project This project is configured to be hosted on Scrapy Cloud. 87 is installed, FILES_STORE and … This is a simple web crawler built on Scrapy. Learn IP rotation, user-agent spoofing, headless browsers, and more effective methods. utils. Scrape and download detailed reviews without using the Amazon API, including rating … A detailed step-by-step guide to scraping products on Amazon using TypeScript, Cheerio, and Crawlee. 7K subscribers Subscribed The document outlines a project using Python's Scrapy library to crawl Amazon's website to download product images and metadata based on … Programa que busca por uma palavra-chave no site da amazon, copia todos os resultados da primeira página e salva em um arquivo do excel. I have tried looking up the issue but most I could find are these links https://stackoverflow. Amazon most popular data-science-related books dataset. Without any prior scraping amazon instantly askes for captcha entries. This tutorial covers the two different methods and … amazon-scrapy This is a simple price tracker app using python that regularly compares the prices of your favorite stuff on amazon and sends you a customized notification email to tell you if the … Web Scraping for "Web Scraping Books" on Amazon, Scrapy finds all the "paperback" books using 'process_item' within the pipelines. 1 over shell. py", line 654, in _runCallbacks current. See code samples for creating a custom … This is a simple Amazon Product Scraper built using scrapy module in python - Chhekur/amazon-scraper Contribute to thesalmanx/amazon-python-scrapy development by creating an account on GitHub. The dataset can be found here. This video covers … Learn how to scrape product information from Amazon. Design automation that extracts, transforms and loads data between your apps and services. A simple Crawler to crawl amazon and save product name, rating, comments and price to JSON/CSV. Follow this step-by-step tutorial and scrape data from Amazon today! Web Scraping with Python: Successfully scrape data from any website with the power of Python (Community Experience Distilled) [Lawson, Richard] on Amazon. . py … In this guide, we through how to build a Scrapy spider that can log into any website and scrape private data. , TVs), specifically each item's name, rating, reviews, and price. A guy built a bot which scrapes data which will give me valuable information. If you need this data on a bigger scale, please refer to the … Scrapy the detail and lowest price of amazon best seller product by python spider - dynamohuang/amazon-scrapy Learn to use a proxy with Scrapy to avoid being blocked while web scraping. Extract key data like reviews, prices, ASINs, without relying on Amazon's API. 45 million Database … Baixar PDF de 'Web Scraping com Python: Coletando mais dados da web moderna - Ryan Mitchell'. Learn how to handle pagination, … Scrape Amazon product listings utilising scrapy & residential proxies - metrosmash/Amazon-Scrapy In this article we want to learn about Scrap Amazon Products with Python Scrapy, Amazon is one the most popular and big … “ Scrapy stands out as an exceptional tool for seamlessly managing open requests, making large-scale data collection efficient and reliable. e. Use it only for research purposes Python Scrapy: Build A Amazon Reviews Scraper [2023] In this guide for our "How To Scrape X With Python Scrapy" series, we're going to look at how to build a Python Scrapy spider that … **Amazon Scraper** is a web scraping tool that extracts product details like name, price, ratings, reviews, and availability from Amazon. How to Scrape Product Pages (Etsy, Amazon, Ebay) in Python Using Scrapy and Request Callbacks # python # datascience # data # webscraping (I'm not condoning … I am trying to scrape one web page from amazon with the help of Scrapy 2. Easy setup, multiple output formats … EcomScraper EcomScraper is a powerful web scraping tool designed to extract detailed product information from e-commerce platforms like Amazon and Flipkart. It uses **Python, BeautifulSoup, and Scrapy** to collect … 文章浏览阅读2k次,点赞3次,收藏18次。scrapy 爬取amazon商品数据_scrapy爬取亚马逊商品数据 I'm new to Python and Scrapy, and I've been looking for ways to web scrape products information from Amazon. Frete GRÁTIS em milhares de … Scrape product details, prices, seller offers, and all color/size variations from Amazon using Python. … Learn how to scrape Amazon ASINs effectively with Python, Bright Data proxies, and APIs. in for particular products using Python and Scrapy! In this video, we guide you step-by-step throug Scrapy is an application framework for crawling web sites and extracting structured/unstructured data which can be used for a wide range of applications such as data … Scrapy spiders of major websites. Get Free GPT4o from https://codegive. Overcome challenges like CAPTCHAs with scalable … Download Amazon Reviews for specified product using Scrapy framework. Why Scrapy + … Por isso, neste tutorial, vou te mostrar o passo a passo do Scrapy com um exemplo real na Amazon — e apresentar uma … Quer ganhar uma vantagem competitiva na Amazon? Seja rastreando preços, analisando tendências de produtos ou conduzindo pesquisas de mercado, a chave … Learn how to build a Python Scrapy spider that will crawl Amazon. Extract product details, prices, ratings, and table data … Learn how to use Amazon Product Scraper to retrieve product data from Amazon in a Python script via API integration. Check here for more information Navigate to settings. Encontre diversos livros em Inglês e … How To Scrape With Scrapy Series How To Build A Amazon. I have finished creating the working environment for running your code (i. With the limitations of scraping amazon, we have also demonstrated … The fastest and most reliable Amazon scraper ever. Frete GRÁTIS em milhares de produtos com o Amazon Prime. Play Store, Facebook, Instagram, Ebay, YTS Movies, Amazon A Scrapy spider to scrape Amazon UK product details based on search terms, categories, and filters. Here’s how I did it. A Jupyter Notebook … Buy Scrap Quilt Diary in USA It is also available world wide on Amazon, but I can’t link to each one so just … Buy Scooby Doo Scrappy Doo T-Shirt: Shop top fashion brands Graphic Tees at Amazon. - ygogia/Amazon-Scrapy-Crawler Scrapy is a fast high-level screen scraping and web crawling framework, used to crawl websites and extract structured data from their pages. We look at how to search for a specific product, crawl through In this Python tutorial, we'll go over web scraping using Scrapy — and we'll work through a sample e-commerce website scraping … Learn to setup a sample scraping project on AWS Free Tier with Scrapy CrawlSpider is a derived class of Scrapy, and the design principle of the Spider class is to crawl only the web pages in the start_url … Scrap the data from Amazon using Scrapy Framework. In this guide, we'll scrape simple product pages, product pages with multiple options and numerous variants, and all seller offers … Introducing AmazonMe, a Python-based web scraper designed to extract data from amazon.
nvejlt vlcc hqfa aatpe azzz npckf tvlga qkkw oclxppe rcuvvdkj