- Table View
- List View
Cybersecurity Ops with bash: Attack, Defend, and Analyze from the Command Line
by Carl Albing Paul TronconeIf you hope to outmaneuver threat actors, speed and efficiency need to be key components of your cybersecurity operations. Mastery of the standard command-line interface (CLI) is an invaluable skill in times of crisis because no other software application can match the CLI’s availability, flexibility, and agility. This practical guide shows you how to use the CLI with the bash shell to perform tasks such as data collection and analysis, intrusion detection, reverse engineering, and administration.Authors Paul Troncone, founder of Digadel Corporation, and Carl Albing, coauthor of bash Cookbook (O’Reilly), provide insight into command-line tools and techniques to help defensive operators collect data, analyze logs, and monitor networks. Penetration testers will learn how to leverage the enormous amount of functionality built into nearly every version of Linux to enable offensive operations.In four parts, security practitioners, administrators, and students will examine:Foundations: Principles of defense and offense, command-line and bash basics, and regular expressionsDefensive security operations: Data collection and analysis, real-time log monitoring, and malware analysisPenetration testing: Script obfuscation and tools for command-line fuzzing and remote accessSecurity administration: Users, groups, and permissions; device and software inventory
iPhone: The Book That Should Have Been in the Box
by David PogueThe iPhone 11, 11 Pro, 11R, and 11Max are faster than ever and have more powerful cameras. With the latest edition of this bestselling guide, you get a funny, gorgeously illustrated guide to the tips, shortcuts, and workarounds that will turn you into an iPhone master.Written by David Pogue—Missing Manual series creator, New York Times columnist, and Emmy-winning tech correspondent for CNBC, CBS, and NPR—this update shows you everything you need to know about new iPhone features and the iOS 13 user interface. Pick up this beautiful full-color book and learn how to get the most out of your iPhone.
Lean Analytics: Use Data to Build a Better Startup Faster
by Alistair Croll Benjamin YoskovitzWhether you're a startup founder trying to disrupt an industry or an entrepreneur trying to provoke change from within, your biggest challenge is creating a product people actually want. Lean Analytics steers you in the right direction.This book shows you how to validate your initial idea, find the right customers, decide what to build, how to monetize your business, and how to spread the word. Packed with more than thirty case studies and insights from over a hundred business experts, Lean Analytics provides you with hard-won, real-world information no entrepreneur can afford to go without.Understand Lean Startup, analytics fundamentals, and the data-driven mindsetLook at six sample business models and how they map to new ventures of all sizesFind the One Metric That Matters to youLearn how to draw a line in the sand, so you'll know it's time to move forwardApply Lean Analytics principles to large enterprises and established products
Jenkins 2: Evolve Your Deployment Pipeline for Next Generation Automation
by Brent LasterDesign, implement, and execute continuous delivery pipelines with a level of flexibility, control, and ease of maintenance that was not possible with Jenkins before. With this practical book, build administrators, developers, testers, and other professionals will learn how the features in Jenkins 2 let you define pipelines as code, leverage integration with other key technologies, and create automated, reliable pipelines to simplify and accelerate your DevOps environments.Author Brent Laster shows you how Jenkins 2 is significantly different from the more traditional, web-only versions of this popular open source automation platform. If you’re familiar with Jenkins and want to take advantage of the new technologies to transform your legacy pipelines or build new modern, automated continuous delivery environments, this is your book.Create continuous delivery pipelines as code with the Jenkins domain-specific languageGet practical guidance on how to migrate existing jobs and pipelinesHarness best practices and new methods for controlling access and securityExplore the structure, implementation, and use of shared pipeline librariesLearn the differences between declarative syntax and scripted syntaxLeverage new and existing project types in JenkinsUnderstand and use the new Blue Ocean graphical interfaceTake advantage of the capabilities of the underlying OS in your pipelineIntegrate analysis tools, artifact management, and containers
Functional Programming with C#: Create More Supportable, Robust, and Testable Code
by Simon J. PainterAfter decades of relative obscurity, functional programming is finally coming into its own. With concise, easy-to-read code that supports asynchronous, concurrent processing, aspects of functional programming have begun to appear in several traditionally object-oriented languages such as C# and Java. This practical book shows C# programmers how to use functional programming features without having to navigate an entirely new language.Because of the shared runtime environment common to C# and F# languages, it's possible to use most of F#'s functional features in C# as well. Author Simon J. Painter explains how you can write functional code in C# right away, without having to install dependencies or features newer than .NET 3. You'll learn why functional programming concepts can bring immediate benefit to your work.Learn what functional programming is and how it originatedDiscover features of the functional paradigm using a more familiar languageStart coding functionally in C# right away, without relying on third-party librariesWrite code that's more robust, less error prone, and easier to testExamine less conventional ways to look at structures available in C#Explore the practicalities of using functional C# in a business environment
Mastering Financial Pattern Recognition: Finding and Back-Testing Candlestick Patterns with Python
by Sofien KaabarCandlesticks have become a key component of platforms and charting programs for financial trading. With these charts, traders can learn underlying patterns for interpreting price action history and forecasts. This A-Z guide shows portfolio managers, quants, strategists, and analysts how to use Python to recognize, scan, trade, and back-test the profitability of candlestick patterns.Financial author, trading consultant, and institutional market strategist Sofien Kaabar shows you how to create a candlestick scanner and indicator so you can compare the profitability of these patterns. With this hands-on book, you'll also explore a new type of charting system similar to candlesticks, as well as new patterns that have never been presented before.With this book, you will:Create and understand the conditions required for classic and modern candlestick patternsLearn the market psychology behind themUse a framework to learn how back-testing trading strategies are conductedExplore different charting systems and understand their limitationsImport OHLC historical FX data in Python in different time framesUse algorithms to scan for and reproduce patternsLearn a pattern's potential by evaluating its profitability and predictability
Make: A Handy Reference for Makers
by Gareth BranwynThis ALL NEW benchtop reference presents more ingenious and indispensable shop tips and pearls of wisdom collected by the editors of Make: and some of the most talented and prolific makers who've contributed to the magazine and Maker Faire over the past decade. Inside you'll find ALL NEW tips for measuring and cutting, gluing and fastening, clamping and joining, drilling, shop organizing, maintenance and repair, and more. The topics covered run the gamut from traditional shopcraft to electronics and soldering. You'll also encounter even more fascinating tales from experienced makers whose personal stories illuminate their favorite tools and best discoveries. Illustrated in full color with photos, drawings, and comic strips, Tips and Tales from the Workshop Volume 2 will continue to entertain and enlighten while inspiring you.
React: Building Web Applications
by Stoyan StefanovHit the ground running with React, the open source technology from Facebook for building rich web applications fast. Updated for the latest React release, the second edition of this hands-on guide shows you how to build React components and organize them into maintainable large-scale apps. If you're familiar with JavaScript syntax, you're ready to get started.Through the course of this book, author Stoyan Stefanov helps web developers and programmers build a complete single-page application. You'll quickly learn why some developers consider React the key to the web app development puzzle.Set up React and write your first "Hello, World" web appCreate and use custom React components alongside generic DOM componentsBuild a data table component that lets you edit, sort, search, and export its contentsMaster the JSX syntaxUse built-in Hooks and create your own custom onesManage the app's data flow with reducers and contextsUse Create React App to take care of the build process and focus on React itselfBuild a complete custom app that lets you store data on the client
Strengthening Deep Neural Networks: Making AI Less Susceptible to Adversarial Trickery
by Katy WarrAs deep neural networks (DNNs) become increasingly common in real-world applications, the potential to deliberately "fool" them with data that wouldn’t trick a human presents a new attack vector. This practical book examines real-world scenarios where DNNs—the algorithms intrinsic to much of AI—are used daily to process image, audio, and video data.Author Katy Warr considers attack motivations, the risks posed by this adversarial input, and methods for increasing AI robustness to these attacks. If you’re a data scientist developing DNN algorithms, a security architect interested in how to make AI systems more resilient to attack, or someone fascinated by the differences between artificial and biological perception, this book is for you.Delve into DNNs and discover how they could be tricked by adversarial inputInvestigate methods used to generate adversarial input capable of fooling DNNsExplore real-world scenarios and model the adversarial threatEvaluate neural network robustness; learn methods to increase resilience of AI systems to adversarial dataExamine some ways in which AI might become better at mimicking human perception in years to come
Building Recommendation Systems in Python and JAX: Hands-On Production Systems at Scale
by Bryan Bischof Hector YeeImplementing and designing systems that make suggestions to users are among the most popular and essential machine learning applications available. Whether you want customers to find the most appealing items at your online store, videos to enrich and entertain them, or news they need to know, recommendation systems (RecSys) provide the way.In this practical book, authors Bryan Bischof and Hector Yee illustrate the core concepts and examples to help you create a RecSys for any industry or scale. You'll learn the math, ideas, and implementation details you need to succeed. This book includes the RecSys platform components, relevant MLOps tools in your stack, plus code examples and helpful suggestions in PySpark, SparkSQL, FastAPI, and Weights & Biases.You'll learn:The data essential for building a RecSysHow to frame your data and business as a RecSys problemWays to evaluate models appropriate for your systemMethods to implement, train, test, and deploy the model you chooseMetrics you need to track to ensure your system is working as plannedHow to improve your system as you learn more about your users, products, and business case
C# 12 in a Nutshell: The Definitive Reference
by Joseph AlbahariWhen you have questions about C# 12 or .NET 8, this best-selling guide has the answers you need. C# is a language of unusual flexibility and breadth, and with its continual growth, there's always so much more to learn. In the tradition of O'Reilly's Nutshell guides, this thoroughly updated edition is simply the best one-volume reference to the C# language available today.Aimed at intermediate and advanced programmers, this is a book whose explanations get straight to the point, covering C#, the CLR, and the core .NET libraries in depth without long intros or bloated samples.Get up to speed on C# from syntax and variables to advanced topics such as pointers, closures, and patternsDig deep into LINQ, with three chapters dedicated to the topicExplore concurrency and asynchrony, advanced threading, and parallel programmingWork with .NET features including regular expressions, networking, assemblies, spans, cryptography, and reflection.emit
The Art of SEO: Mastering Search Engine Optimization
by Eric Enge Stephan Spencer Jessie StricchiolaThree acknowledged experts in search engine optimization share guidelines and innovative techniques that will help you plan and execute a comprehensive SEO strategy. Complete with an array of effective tactics from basic to advanced, this fourth edition prepares digital marketers for 2023 and beyond with updates on SEO tools and new search engine optimization methods that have reshaped the SEO landscape, including how generative AI can be used to support SEO and SEO-related tasks.Novices will receive a thorough SEO education, while experienced SEO practitioners get an extensive reference to support ongoing engagements.Learn about the various intricacies and complexities of internet searchExplore the underlying theory and inner workings of search engines and their algorithmsUnderstand the interplay between social media engagement and other factorsDiscover tools to track results and measure successExamine the effects of key Google algorithm updatesConsider opportunities for visibility in mobile, local, vertical, social, and voice searchBuild a competent SEO team with defined rolesIdentify what opportunities exist for using generative AI as part of an SEO programGain insights into the future of search and internet discoverability
Learning TensorFlow: A Guide to Building Deep Learning Systems
by Itay Lieder Tom Hope Yehezkel S. ResheffRoughly inspired by the human brain, deep neural networks trained with large amounts of data can solve complex tasks with unprecedented accuracy. This practical book provides an end-to-end guide to TensorFlow, the leading open source software library that helps you build and train neural networks for computer vision, natural language processing (NLP), speech recognition, and general predictive analytics.Authors Tom Hope, Yehezkel Resheff, and Itay Lieder provide a hands-on approach to TensorFlow fundamentals for a broad technical audience—from data scientists and engineers to students and researchers. You’ll begin by working through some basic examples in TensorFlow before diving deeper into topics such as neural network architectures, TensorBoard visualization, TensorFlow abstraction libraries, and multithreaded input pipelines. Once you finish this book, you’ll know how to build and deploy production-ready deep learning systems in TensorFlow.Get up and running with TensorFlow, rapidly and painlesslyLearn how to use TensorFlow to build deep learning models from the ground upTrain popular deep learning models for computer vision and NLPUse extensive abstraction libraries to make development easier and fasterLearn how to scale TensorFlow, and use clusters to distribute model trainingDeploy TensorFlow in a production setting
Cloud Native Go: Building Reliable Services in Unreliable Environments
by Matthew A. TitmusLearn how to use Go's strengths to develop services that are scalable and resilient even in an unpredictable environment. With this book's expanded second edition, Go developers will explore the composition and construction of cloud native applications, from lower-level Go features and mid-level patterns to high-level architectural considerations.Each chapter in this new edition builds on the lessons of the previous chapter, taking intermediate to advanced developers through Go to construct a simple but fully featured distributed key-value store. You'll learn about Go generics, dependability and reliability, memory leaks, and message-oriented middleware. New chapters on security and distributed state delve into critical aspects of developing secure distributed cloud native applications.With this book you will:Learn the features that make Go an ideal language for building cloud native softwareUnderstand how Go solves the challenges of designing scalable distributed servicesDesign and implement a reliable cloud native service by leveraging Go's lower-level features such as channels and goroutinesApply patterns, abstractions, and tooling to effectively build and manage complex distributed systemsOvercome stumbling blocks when using Go to build and manage a cloud native service
Deep Learning Cookbook: Practical Recipes to Get Started Quickly
by Douwe OsingaDeep learning doesn’t have to be intimidating. Until recently, this machine-learning method required years of study, but with frameworks such as Keras and Tensorflow, software engineers without a background in machine learning can quickly enter the field. With the recipes in this cookbook, you’ll learn how to solve deep-learning problems for classifying and generating text, images, and music.Each chapter consists of several recipes needed to complete a single project, such as training a music recommending system. Author Douwe Osinga also provides a chapter with half a dozen techniques to help you if you’re stuck. Examples are written in Python with code available on GitHub as a set of Python notebooks.You’ll learn how to:Create applications that will serve real usersUse word embeddings to calculate text similarityBuild a movie recommender system based on Wikipedia linksLearn how AIs see the world by visualizing their internal stateBuild a model to suggest emojis for pieces of textReuse pretrained networks to build an inverse image search serviceCompare how GANs, autoencoders and LSTMs generate iconsDetect music styles and index song collections
Learning Apache Drill: Query and Analyze Distributed Data Sources with SQL
by Paul Rogers Charles GivreGet up to speed with Apache Drill, an extensible distributed SQL query engine that reads massive datasets in many popular file formats such as Parquet, JSON, and CSV. Drill reads data in HDFS or in cloud-native storage such as S3 and works with Hive metastores along with distributed databases such as HBase, MongoDB, and relational databases. Drill works everywhere: on your laptop or in your largest cluster.In this practical book, Drill committers Charles Givre and Paul Rogers show analysts and data scientists how to query and analyze raw data using this powerful tool. Data scientists today spend about 80% of their time just gathering and cleaning data. With this book, you’ll learn how Drill helps you analyze data more effectively to drive down time to insight.Use Drill to clean, prepare, and summarize delimited data for further analysisQuery file types including logfiles, Parquet, JSON, and other complex formatsQuery Hadoop, relational databases, MongoDB, and Kafka with standard SQLConnect to Drill programmatically using a variety of languagesUse Drill even with challenging or ambiguous file formatsPerform sophisticated analysis by extending Drill’s functionality with user-defined functionsFacilitate data analysis for network security, image metadata, and machine learning
The Cybersecurity Manager's Guide: The Art Of Building Your Security Program
by Todd BarnumIf you're a cybersecurity professional, then you know how it often seems that no one cares about (or understands) information security. InfoSec professionals frequently struggle to integrate security into their companies' processes. Many are at odds with their organizations. Most are under-resourced. There must be a better way. This essential manager's guide offers a new approach to building and maintaining an information security program that's both effective and easy to follow.Author and longtime chief information security officer (CISO) Todd Barnum upends the assumptions security professionals take for granted. CISOs, chief security officers, chief information officers, and IT security professionals will learn a simple seven-step process for building a new program or improving a current one.Build better relationships across the organizationAlign your role with your company's values, culture, and tolerance for information lossLay the groundwork for your security programCreate a communications program to share your team's contributions and educate your coworkersTransition security functions and responsibilities to other teamsOrganize and build an effective InfoSec teamMeasure your company's ability to recognize and report security policy violations and phishing emails
Google Cloud Cookbook: Practical Solutions for Building and Deploying Cloud Services
by Drew Hodun Rui Santos CostaGet quick hands-on experience with Google Cloud. This cookbook provides a variety of self-contained recipes that show you how to use Google Cloud services for your enterprise application. Whether you're looking for practical ways to apply microservices, AI, analytics, security, or networking solutions, these recipes take you step-by-step through the process and provide discussions that explain how and why the recipes work.Ideal for system engineers and administrators, developers, network and database administrators, and data analysts, this cookbook helps you get started with Google Cloud regardless of your level of experience. Google veterans Rui Costa and Drew Hodun also cover advanced-level Google Cloud services for those who have appreciable experience with the platform.Learn how to get started with Google CloudUnderstand the depth of services Google Cloud providesGain hands-on experience using practical examples and labsExplore topics that include BigQuery, Cloud Run, and KubernetesBuild and run mobile and web applications on Google CloudExamine ways to build your cloud applications for scaleBuild a minimum viable product (MVP) app to use in productionLearn data platform and pipeline skills
Version Control with Git: Powerful Tools and Techniques for Collaborative Software Development
by Jon Loeliger Prem Kumar PonuthoraiTrack, branch, merge, and manage code revisions with Git, the free and open source distributed version control system. Through a series of step-by-step tutorials, this practical guide quickly takes you from Git fundamentals to advanced techniques, and provides friendly yet rigorous advice for navigating Git's many functions. You'll learn how to work with everything from small to very large projects with speed and efficiency.In this third edition, authors Prem Kumar Ponuthorai and Jon Loeliger break down Git concepts using a modular approach. You'll start with the basics and fundamental philosophy of Git, followed by intermediate commands to help you efficiently supplement your daily development workflow. Finally, you'll learn advanced Git commands and concepts to understand how Git works under the hood.Learn how to use Git for real-world development scenariosGain insight into Git's common use cases, initial tasks, and basic functionsUse the system for distributed version controlLearn how to manage merges, conflicts, patches, and diffsApply advanced techniques such as rebasing, hooks, and ways to handle submodules
WebAssembly: Safe, Fast, and Portable Code
by Brian SlettenWebAssembly: The Definitive Guide is a thorough and accessible introduction to one of the most transformative technologies hitting our industry. What started as a way to use languages other than JavaScript in the browser has evolved into a comprehensive path toward portability, performance, increased security, and greater code reuse across an impressive collection of deployment targets.Author Brian Sletten introduces elements of this technology incrementally while building to several concrete, code-driven examples of practical, cutting-edge WebAssembly uses. Whether you work with enterprise software or embedded systems, or in entertainment, scientific computing, or startup environments, you'll learn how WebAssembly can have a positive impact on the way you develop software.Use WebAssembly to increase code portability across platformsReuse more of your software assets in a wider number of deployment targetsLearn how WebAssembly increases protection against prominent security attacksUse WebAssembly to deploy legacy code in web environmentsIncrease your user base across languages and development environmentsIntegrate JavaScript code with other languages and environments to improve performance, security, and productivityLearn how WebAssembly will affect your career as software developer
Easy Electronics
by Charles PlattThis is the simplest, quickest, least technical, most affordable introduction to basic electronics. No tools are necessary--not even a screwdriver. Easy Electronics should satisfy anyone who has felt frustrated by entry-level books that are not as clear and simple as they are supposed to be.Brilliantly clear graphics will take you step by step through 12 basic projects, none of which should take more than half an hour. Using alligator clips to connect components, you see and hear immediateresults. The hands-on approach is fun and intriguing, especially for family members exploring the projects together.The 12 experiments will introduce you to switches, resistors, capacitors, transistors, phototransistors, LEDs, audio transducers, and a silicon chip. You'll even learn how to read schematics by comparing them with the circuits that you build.No prior knowledge is required, and no math is involved. You learn by seeing, hearing, and touching. By the end of Experiment 12, you may be eager to move on to a more detailed book. Easy Electronics will function perfectly as a prequel to the same author's bestseller, Make: Electronics.All the components listed in the book are inexpensive and readily available from online sellers. A very affordable kit has been developed in conjunction with the book to eliminate the chore of shopping for separate parts. A QR code inside the book will take you to the vendor's web site.Concepts include:Transistor as a switch or an amplifierPhototransistor to function as an alarmCapacitor to store and release electricityTransducer to create sounds from a timerResistor codesA miniature light bulb to display voltageThe inner workings of a switchUsing batteries and resistors in series and parallelCreating sounds by the pressure of your fingerMaking a matchbox that beeps when you touch itAnd more. Grab your copy and start experimenting!
Practical Data Science with SAP: Machine Learning Techniques for Enterprise Data
by Greg Foss Paul ModdermanLearn how to fuse today's data science tools and techniques with your SAP enterprise resource planning (ERP) system. With this practical guide, SAP veterans Greg Foss and Paul Modderman demonstrate how to use several data analysis tools to solve interesting problems with your SAP data.Data engineers and scientists will explore ways to add SAP data to their analysis processes, while SAP business analysts will learn practical methods for answering questions about the business. By focusing on grounded explanations of both SAP processes and data science tools, this book gives data scientists and business analysts powerful methods for discovering deep data truths.You'll explore:Examples of how data analysis can help you solve several SAP challengesNatural language processing for unlocking the secrets in textData science techniques for data clustering and segmentationMethods for detecting anomalies in your SAP dataData visualization techniques for making your data come to life
Learn Electronics with Arduino: An Illustrated Beginner's Guide to Physical Computing
by Jody Culkin Eric HaganThis book is your introduction to to physical computing with the Arduino microcontroller platform. No prior experience is required, not even an understanding of basic electronics. With color illustrations, easy-to-follow explanations, and step-by-step instructions, the book takes the beginner from building simple circuits on a breadboard to setting up the Arduino IDE and downloading and writing sketches to run on the Arduino. Readers will be introduced to basic electronics theory and programming concepts, as well as to digital and analog inputs and outputs. Throughout the book, debugging practices are highlighted, so novices will know what to do if their circuits or their code doesn't work for the current project and those that they embark on later for themselves. After completing the projects in this book, readers will have a firm basis for building their own projects with the Arduino.Written for absolute beginners with no prior knowledge of electronics or programmingFilled with detailed full-color illustrations that make concepts and procedures easy to followAn accessible introduction to microcontrollers and physical computingStep-by-step instructions for projects that teach fundamental skillsIncludes a variety of Arduino-based projects using digital and analog input and output
Fundamentals of Deep Learning: Designing Next-Generation Machine Intelligence Algorithms
by Nikhil Buduma Joe Papa Nithin BudumaWe're in the midst of an AI research explosion. Deep learning has unlocked superhuman perception to power our push toward creating self-driving vehicles, defeating human experts at a variety of difficult games including Go, and even generating essays with shockingly coherent prose. But deciphering these breakthroughs often takes a PhD in machine learning and mathematics.The updated second edition of this book describes the intuition behind these innovations without jargon or complexity. Python-proficient programmers, software engineering professionals, and computer science majors will be able to reimplement these breakthroughs on their own and reason about them with a level of sophistication that rivals some of the best developers in the field.Learn the mathematics behind machine learning jargonExamine the foundations of machine learning and neural networksManage problems that arise as you begin to make networks deeperBuild neural networks that analyze complex imagesPerform effective dimensionality reduction using autoencodersDive deep into sequence analysis to examine languageExplore methods in interpreting complex machine learning modelsGain theoretical and practical knowledge on generative modelingUnderstand the fundamentals of reinforcement learning
Machine Learning and Data Science Blueprints for Finance: From Building Trading Strategies To Robo-advisors Using Python
by Hariom Tatsat Sahil Puri Brad LookabaughOver the next few decades, machine learning and data science will transform the finance industry. With this practical book, analysts, traders, researchers, and developers will learn how to build machine learning algorithms crucial to the industry. You'll examine ML concepts and over 20 case studies in supervised, unsupervised, and reinforcement learning, along with natural language processing (NLP).Ideal for professionals working at hedge funds, investment and retail banks, and fintech firms, this book also delves deep into portfolio management, algorithmic trading, derivative pricing, fraud detection, asset price prediction, sentiment analysis, and chatbot development. You'll explore real-life problems faced by practitioners and learn scientifically sound solutions supported by code and examples.This book covers:Supervised learning regression-based models for trading strategies, derivative pricing, and portfolio managementSupervised learning classification-based models for credit default risk prediction, fraud detection, and trading strategiesDimensionality reduction techniques with case studies in portfolio management, trading strategy, and yield curve constructionAlgorithms and clustering techniques for finding similar objects, with case studies in trading strategies and portfolio managementReinforcement learning models and techniques used for building trading strategies, derivatives hedging, and portfolio managementNLP techniques using Python libraries such as NLTK and scikit-learn for transforming text into meaningful representations