Tutorials on Natural Language Processing, Machine Learning, Data Extraction, and more
Edit Distance (a.k.a. Levenshtein Distance) is a measure of similarity between two strings referred to as the source string and the target string.
The distance between the source string and the target string is the minimum number of edit operations (deletions, insertions, or substitutions) required to transform the source into the target. The lower the distance, the more similar the two strings.
Continue reading “Edit Distance and Jaccard Distance Calculation with NLTK”
In this chatbot tutorial, you will learn the basic concepts behind building a Chatbot. By the end of this tutorial, you will be able to create a simple Facebook chatbot bot.
Continue reading “Chatbot Building for Facebook Messenger”
Python Programmer, Computer Scientist, Researcher at Federal University of Maranhão, Brazil, and member of the Intelligent Distributed Systems Laboratory, who loves sharing what he knows. Among the topics Ivan is interested in are: Machine Learning (ML), Reinforcement Learning (RL), Game Theory (GT), Natural Language Processing (NLP), Computer Vision (CV), Time Series (TS), and other Artificial Intelligence (AI) related topics.
In this tutorial, we introduce one of most common NLP and Text Mining tasks, that of Document Classification. Note that while being common, it is far from useless, as the problem of classifying content is a constant hurdle we humans face every day. It is important to know basic elements of this problem since many of them can be used for other tasks such as sentiment analysis.
Continue reading “Text Classification with Pandas & Scikit”
Python Programmer, Computer Scientist, Researcher at Federal University of Maranhão, Brazil, and member of the Intelligent Distributed Systems Laboratory, who loves sharing what he knows. Among the topics Ivan is interested in are: Machine Learning (ML), Reinforcement Learning (RL), Game Theory (GT), Natural Language Processing (NLP), Computer Vision (CV), Time Series (TS), and other Artificial Intelligence (AI) related topics.
Neste tutorial, você vai aprender como logar em site que requerem um usuário e uma senha antes de mostrar páginas específicas.
Continue reading “Logando com o Scrapy FormRequest”
With online courses, you can study anywhere, at the time suitable for you, get full lifetime access, and a Certificate of Completion. It is a wonderful experience that enables you to be taught by international skillful instructors whom you might not get the chance to meet otherwise. Nowadays, e-learning is a great advantage of technology that enables you to easily improve your skills and enjoy the learning experience.
In this article, we are trying to recommend the 11 best Python courses currently available on Udemy, the prominent online courses platform.
There are several popular platforms that give developers access to their “web services”, aka “APIs” (Application Programming Interface). So using APIs is the official way for data extraction and doing other stuff allowed by such applications. You can even benefit from some APIs to build other applications. REST APIs usually generate output in JSON or XML format because most of programming languages can handle these formats easily. In fact, JSON (JavaScript Object Notation) is very similar to data types in programming languages; for example, it is very similar to Python dictionaries. If a REST API allows you to get the data you want to retrieve, then you do not need regular web scraping.
Some APIs require authentication (API Key or Client ID and Client Secret, similar to a username and password, so to speak) to control their usage, and some do not. We will explain this later in multiple APIs. For the purpose of clarifying the basics, we will start with a very simple currency rate conversion API that does not require any authentication.
In this tutorial, you will learn how to use Python to extract data from ExchangeRatesAPI.io which is -according to its official website- “a free service for current and historical foreign exchange rates published by the European Central Bank.” Continue reading “Data Extraction from APIs with Python – Currency Exchange”
If you come here searching for a discount coupon for our best-selling Scrapy course, you finally got it. Click here to get your Scrapy course coupon. Enjoy your hassle-free learning experience and earn more income through applying for well-paid Scrapy jobs. Continue reading “Scrapy: Powerful Web Scraping & Crawling with Python – Course”
In this Scrapy tutorial, you will learn how to write a Craigslist crawler to scrape Craigslist‘s “Architecture & Engineering” jobs in New York and store the data to a CSV file.
This tutorial is one lecture of our comprehensive Scrapy online course on Udemy, Scrapy: Powerful Web Scraping & Crawling with Python Continue reading “Scrapy Tutorial: Web Scraping Craigslist”
There are several Web Scraping best practices you have to follow. Among them are critical questions you have to ask yourself beforehand. Continue reading “3 Questions to Ask Before Web Scraping”
So let’s assume we want to scrape the titles of jobs available in Boston from Craigslist. For now, we will work on one page only. Continue reading “Beautiful Soup Tutorial #3: Web Scraping Craigslist (One Page)”
