Web Scraping in Python: Tools, Techniques, and Legality
The Real Python Podcast
How to Save Your Site Structure
You absolutely want to save as you go. If the site structures just happen to change a little bit or if you hadn't counted any kind of error at all, it's possible that your code can completely stop. And then any data you've scraped so far could completely be lost. So I would definitely recommend, you know, not only just putting in the pauses and being respectful, but also just saving whatever information you have.
Do you want to get started with web scraping using Python? Are you concerned about the potential legal implications? What are the tools required and what are some of the best practices? This week on the show we have Kimberly Fessel to discuss her excellent tutorial created for PyCon 2020 online titled “It’s Officially Legal so Let’s Scrape the Web.”
We discuss getting started with web scraping, and cover tools and techniques. Kimberly gives advice on finding elements inside of the html, and techniques for cleaning your data. She also notes a recent change to the legal landscape regarding scraping the web.
Kimberly is a Senior Data Scientist at Metis Data Science Bootcamp in New York City. She holds a Ph.D. in applied mathematics. We talk about her switch from academia to data science, and discuss her passion for data storytelling and visualizations.
Course Spotlight: Defining Main Functions in Python
This course will get you up to speed with defining a starting point for the execution of a program, and helps you to understand what goes into the main() function. Prepare for a deep dive as you go through the sections. It’s a worthy investment of your time to understand this vital entry point for your Python scripts and applications!
Topics:
- 00:00:00 – Introduction
- 00:01:31 – Kimberly’s background and Metis Data Science Bootcamp
- 00:02:19 – NLP and work in advertising
- 00:03:27 – Changes in the legality of web scraping
- 00:06:12 – What are good projects for web scraping?
- 00:06:56 – Tools to start web scraping
- 00:07:51 – How to find the elements you want?
- 00:09:00 – How much HTML should you know?
- 00:10:49 – Inspecting elements in the browser
- 00:14:30 – What are good sites to practice on?
- 00:16:20 – Pausing between requests
- 00:19:02 – Saving as you go
- 00:20:54 – Real Python Video Course Spotlight
- 00:21:55 – Navigating the DOM
- 00:23:10 – Data cleaning and formatting
- 00:28:26 – Dynamic sites and Selenium
- 00:32:16 – Scrapy
- 00:33:55 – PyOhio 2020
- 00:35:40 – Transition out of academia
- 00:38:40 – What are you excited about in the world of Python?
- 00:41:05 – What do you want to learn next in Python?
- 00:48:00 – What is a less known Python tip or trick?
- 00:49:17 – Thanks and Goodbye
Show Links:
- Kimberly Fessel, PHD - Blog
- Metis: Data Science Training
- It’s Officially Legal so Let’s Scrape the Web: PyCon 2020 online - Tutorial
- Victory! Ruling in hiQ v. Linkedin Protects Scraping of Public Data: EFF.org
- Computer Fraud and Abuse Act - Wikipedia Article
- Box Office Mojo
- Sports Reference | Sports Stats, fast, easy, and up-to-date
- Springfield! Springfield! - TV & Movie Scripts - Archive.org
- Jupyter Notebook: An Introduction - Real Python Article
- The Python pickle Module: How to Persist Objects in Python - Real Python Article
- A Practical Introduction to Web Scraping in Python - Real Python Article
- Beautiful Soup: Build a Web Scraper With Python - Real Python Article
- Making HTTP Requests With Python - Real Python Video Course
- Natural Language Processing With spaCy in Python - Real Python Article
- Delorean: Time Travel Made Easy
- Maya: Datetimes for Humans
- Regular Expressions: Regexes in Python (Part 1) - Real Python Article
- Selenium: Automates browsers. That’s it!
- Scrapy: Framework for extracting the data you need from websites
- PyOhio 2020
- ODSC: Open Data Science Conference
- Slides from Kimberly’s talk - Level Up: Fancy NLP with Straightforward Tools
- Tonks: A general purpose deep learning library
- Tonks: Building One (Multi-Task) Model to Rule Them All! - Medium Article
- Plotly | Dash
- geoplotlib: Python toolbox for visualizing geographical data and making map
- GeoPandas: Make working with geospatial data in Python easier
- Altair: Declarative Visualization in Python
- Understanding the Transform Function in Pandas: Practical Business Python
JavaScript charting detour:
- Down and Up: A Puzzle Illustrated with D3.js - Kimberly’s blog
- d3js - Data-Driven Documents
- Crossfilter: Fast Multidimensional Filtering for Coordinated Views
- dc.js - Dimensional Charting JavaScript Library
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