book

Teach Yourself VISUALLY Python

Name: Teach Yourself VISUALLY Python
ISBN: 9781119860259

by Ted Hart-Davis, Guy Hart-Davis

September 2022

Beginner

304 pages

9h 43m

English

Wiley

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Cover
Title Page
Copyright
Chapter 1: Getting Ready to Work with Python
Understanding What Python Is and DoesChoose the Right Version of PythonInstall Python on WindowsInstall Python on the MacInstall Python on Linux If NecessaryLearn About Development Tools for PythonDownload and Install Visual Studio CodeGet Started with Visual Studio Code and Apply a ThemeInstall Visual Studio Code Extensions for PythonConfigure Visual Studio Code for Working with Python
Chapter 2: Writing and Running Your First Python Code
Understanding the main() FunctionCreate and Save a New Script in Visual Studio CodeWrite and Run Code in Visual Studio CodeExecute Python Commands in a Terminal WindowRun a Python Script in a Terminal WindowUnderstanding Comments in PythonAdd Comments to Your CodeGrasp Importing Modules and ObjectsImport Modules and Use Their Methods
Chapter 3: Getting Started with Variables
Understanding Variables and Their UsageUnderstanding Python’s Data TypesWork with IntegersWork with Floating-Point ValuesWork with Boolean ValuesWork with TuplesWork with SetsStart Working with StringsStart Working with ListsStart Working with DictionariesConvert Data from One Type to Another
Chapter 4: Working with Files and Directories
Understanding Working with Files and DirectoriesLoad the os Module and List Files and DirectoriesNavigate Among DirectoriesCreate and Delete DirectoriesRename, Move, and Copy Files and DirectoriesGet Information About the User and SystemSplit a File Path into Its ComponentsUnderstanding Python’s open() FunctionUnderstanding Python’s Ways of Closing FilesOpen a File If It Exists; If Not, Create ItCheck an Open File’s Status and Close ItWrite Data to a FileOpen a File for Both Reading and WritingAppend Data to a FileRead a Text File
Chapter 5: Working with Python’s Operators
Meet the Arithmetic OperatorsWork with the Arithmetic OperatorsMeet the Assignment OperatorsWork with the Assignment OperatorsMeet the Comparison OperatorsWork with the Comparison OperatorsMeet the Logical OperatorsWork with the Logical OperatorsMeet the Identity OperatorsWork with the Identity OperatorsMeet the Membership OperatorsWork with the Membership OperatorsMeet the Bitwise OperatorsWork with the Bitwise Operators
Chapter 6: Making Decisions with if Statements
Learn the Essentials of if StatementsUnderstanding the if StatementCreate an if StatementUnderstanding the if… else StatementCreate an if… else StatementUnderstanding the if… elif StatementCreate an if… elif StatementUnderstanding the if… elif… else StatementCreate an if… elif… else StatementUnderstanding Nested if StatementsCreate Nested if Statements
Chapter 7: Repeating Actions with Loops
Understanding Python’s LoopsUnderstanding How for Loops WorkCreate for LoopsUnderstanding How while Loops WorkCreate while LoopsUnderstanding break Statements in LoopsUsing a break Statement to Exit a Loop EarlyUnderstanding continue Statements in LoopsUsing a continue Statement in a LoopUnderstanding else Statements in LoopsUsing an else Statement in a LoopUnderstanding Loop NestingNest Loops to Create Complex Repetition
Chapter 8: Working with Functions
Understanding Functions and Their SyntaxUnderstanding Function Parameters and ReturnsUsing Python’s Built-In FunctionsCreate a Function with Parameters and a ReturnCreate a Function with a Parameter But No ReturnCreate a Function with No Parameters But a ReturnCreate a Function with No Parameters and No ReturnCreate a Function That Returns Multiple ValuesCreate a Function with Optional Parameters

Chapter 9: Working with Text
Learn the Essentials of StringsCreate Single-Line StringsCreate Multiline StringsMeet Python’s String MethodsReturn Information About a StringTransform and Clean Up a StringReturn Part of a String via SlicingConcatenate and Repeat StringsSearch for One String Inside Another StringCheck and Change String CapitalizationMeet Python’s Tools for Building StringsBuild Strings with the Interpolation OperatorBuild Strings with the .format MethodBuild Strings with f-StringsBuild Strings with Template Strings
Chapter 10: Handling Errors
Understanding the Various Types of ErrorsIdentify Common Python ErrorsMeet the try… except BlockCause Errors and Trap ExceptionsRaise an Exception ManuallyAdd an else Block or a finally BlockCreate Nested try… except BlocksCreate Custom Exceptions
Chapter 11: Working with Lists and Dictionaries
Understanding Lists and Their UseCreate a ListMeet Python’s List MethodsAdd Items to a ListRemove Items from a ListLocate Items and Access Data in a ListSort the Items in a ListUnderstanding Dictionaries and Their UseCreate a Dictionary and Return ValuesMeet Python’s Dictionary MethodsCreate a Dictionary from an Existing IterableAdd Key/Value Pairs to a DictionaryRemove Key/Value Pairs from a DictionaryReturn Keys and Values from a Dictionary
Chapter 12: Working with Classes
Understanding Classes and InstancesCreate a Class and Instantiate InstancesUnderstanding Class and Instance AttributesSet Class and Instance AttributesGrasp Class, Instance, and Static MethodsCreate an Instance MethodCreate a Class MethodCreate a Static MethodReview the Class’s Code
Index
End User License Agreement

Content preview from Teach Yourself VISUALLY Python

CHAPTER 10

Handling Errors

In this chapter, you learn how to handle errors in Python. First, we quickly review the different types of errors that occur in computer code and the ways you can catch the different types. We then focus on using try… except blocks to handle errors in your Python code. You learn to cause errors, trap exceptions, and create custom exceptions.

Snapshot of handling errors.

Understanding the Various Types of Errors

Identify Common Python Errors

Meet the try… except Block

Cause Errors and Trap Exceptions

Raise an Exception Manually

Add an else Block or a finally Block

Create Nested try… except Blocks

Create Custom Exceptions

Understanding the Various Types of Errors

In this section, you learn about the different types of errors that can occur in code, what causes them, and what you can do to eliminate them.

We start with compile-time errors, errors that occur when Python is unable to create workable instructions from the commands in a script. Many compile-time errors are syntax errors, mistakes in the structure of the code. We then move on to runtime errors, errors that occur after Python has compiled a script successfully and has moved on to executing it. Runtime errors include semantic errors and logical errors.

Compile-Time Errors

Python is generally considered an interpreted language, which is often understood to mean that it is not a compiled language. But the difference between ...

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Teach Yourself VISUALLY Python

by Ted Hart-Davis, Guy Hart-Davis

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.