book

Foundational Python for Data Science

by Kennedy Behrman

September 2021

Beginner to intermediate

256 pages

6h 48m

English

Addison-Wesley Professional

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Includes

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Running Python StatementsJupyter NotebooksGoogle ColabSummaryQuestions
Basic Types in PythonPerforming Basic Math OperationsUsing Classes and Objects with Dot NotationSummaryQuestions
Shared OperationsLists and TuplesStringsRangesSummaryQuestions
DictionariesSetsFrozensetsSummaryQuestions
Compound Statementsif Statementswhile Loopsfor Loopsbreak and continue StatementsSummaryQuestions
Defining FunctionsScope in FunctionsDecoratorsAnonymous FunctionsSummaryQuestions
Installing and Importing NumPyCreating ArraysIndexing and SlicingElement-by-Element OperationsFiltering ValuesViews Versus CopiesSome Array MethodsBroadcastingNumPy MathSummaryQuestions
SciPy OverviewThe scipy.misc SubmoduleThe scipy.special SubmoduleThe scipy.stats SubmoduleSummaryQuestions
About DataFramesCreating DataFramesInteracting with DataFrame DataManipulating DataFramesManipulating DataInteractive DisplaySummaryQuestions
matplotlibSeabornPlotlyBokehOther Visualization LibrariesSummaryQuestions
Popular Machine Learning LibrariesHow Machine Learning WorksLearning More About Scikit-learnSummaryQuestions
NLTK Sample TextsFrequency DistributionsText ObjectsClassifying TextSummaryExercises
Introduction to Functional ProgrammingList ComprehensionsGeneratorsSummaryQuestions
Grouping State and FunctionSpecial MethodsInheritanceSummaryQuestions
SortingReading and Writing Filesdatetime ObjectsRegular ExpressionsSummaryQuestions

Content preview from Foundational Python for Data Science

12 Natural Language Toolkit

One of the first things taught in introductory statistics textbooks is that correlation is not causation. It is also one of the first things forgotten.

Thomas Sowell

In This Chapter

Using a computer to derive insights into text is incredibly useful. The subset of data science that addresses deriving insights into text is called natural language processing. The Natural Language Toolkit (NLTK) is a Python package for all things language processing. This chapter takes a quick look at this powerful package.