With it, you'll learn how to write Python programs that work with large collections of unstructured text. You'll access richly annotated datasets using a comprehensive range of linguistic data structures, and you'll understand the main algorithms for analyzing the content and structure of written communication.Packed with examples and exercises, Natural Language Processing with Python will help you: Extract information from unstructured text, either to guess the topic or identify "named entities" Analyze linguistic structure in text, including parsing and semantic analysis Access popular linguistic databases, including WordNet and treebanks Integrate techniques drawn from fields as diverse as linguistics and artificial intelligenceThis book will help you gain practical skills in natural language processing using the Python programming language and the Natural Language Toolkit (NLTK) open source library. If you're interested in developing web applications, analyzing multilingual news sources, or documenting endangered languages -- or if you're simply curious to have a programmer's perspective on how human language works -- you'll find Natural Language Processing with Python both fascinating and immensely useful.

    And everything that is alive traces back to things that, puzzlingly, weren't. For centuries, the scientific question of life's origins has confounded us. But in Every Life is on Fire, physicist Jeremy England argues that the answer has been under our noses the whole time, deep within the laws of thermodynamics. England explains how, counterintuitively, the very same forces that tend to tear things apart assembled the first living systems.But how life began isn't just a scientific question. We ask it because we want to know what it really means to be alive. So England, an ordained rabbi, uses his theory to examine how, if at all, science helps us find purpose in a vast and mysterious universe.In the tradition of Viktor Frankl's Man's Search for Meaning, Every Life is on Fire is a profound testament to how something can come from nothing.

    But in The Music of Life, world renowned physiologist Denis Noble argues that, to truly understand life, we must look beyondthe selfish gene to consider life on a much wider variety of levels. Life, Noble asserts, is a kind of music, a symphonic interplay between genes, cells, organs, body, and environment. He weaves this musical metaphor throughout this personal and deeply lyrical work, illuminating ideas that might otherwise be daunting to non-scientists. In elegant prose, Noblesets out a cutting-edge alternative to the gene's eye view, offering a radical switch of perception in which genes are seen as prisoners and the organism itself is a complex system of many interacting levels. In his more expansive view, life emerges as a process, the ebb and flow of activity in anintricate web of connections. He introduces readers to the realm of systems biology, a field that has been growing in strength in the past decade. Noble, himself one of the founders of this field, argues modern systems biology may be the view we need to adopt to gain a deeper understanding of thenature of life. Drawing on his experiences in his research on the heartbeat, and on evolutionary biology, development, medicine, philosophy, linguistics, and Chinese culture, Noble presents us with a profound and very modern reflection on the nature of life.