Learn Python in 7 Days电子书

Title Page

Copyright

Credits

About the Authors

About the Reviewer

www.PacktPub.com

Customer Feedback

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

Getting Started with Python

Why Python?

Python applications

Versions

Implementations of Python

Installation

Installation on Windows platform

Installation on Linux platform

Installation on Mac OS

Notepad++ installation

Python file formats

Python interactive shell

System or environment variables

Setting environment variables in Windows

Setting environment variables in Linux

Setting environment variables in Mac OS (OS 10.9)

Writing a simple Hello World! program

Basic Python syntax

Comments in Python

Triple, double and single quotes

Python back slash

String inside the quotes

Escape sequence in Python

String concatenation

Formatted output

Indentation

Summary

Type Variables and Operators

Variables

Single assignment

Multiple assignment

Data types in Python

Numeric data types or numbers

Integers and long integers

Floating point numbers

Complex numbers

Boolean data type

String data types

American Standard Code for Information Interchange (ASCII) character sets

Conversion functions

Arithmetic expressions

Mixed mode arithmetic

Mixed Mode Conversion

Type conversions

Operators

Arithmetic operators

Comparison operators

Variants of assignment operator

Bitwise operators

Logical operators

Membership operators

Identity operators

Operator precedence

Summary

Strings

Python strings

The subscript operator

Slicing for substrings

Python string methods

String case methods

String strip methods

String split methods

String justify methods

String Boolean methods

String functions

Tuple

Creating an empty tuple

Creating tuple with elements

Indexing tuple

Slicing of tuple

Unpacking the items of tuples

Tuple functions

Operations of tuples

Exercise

Summary

Lists

Creating a list

Creating a list with values

Unpacking list values

List operations

Accessing list values

Slicing the list

Updating the list

Deleting values from a list

Addition of Python lists

Multiplication of lists

in operator

List functions

len()

max ()

list ()

sorted ()

List methods

append ()

extend ()

Difference between append and extend.

count ()

index ()

insert()

remove()

pop()

reverse()

List comprehensions

Exercises

Summary

Dictionary

Overview of dictionary

Operations on the dictionary

Accessing the values of dictionary

Deleting an item from the dictionary

Updating the values of the dictionary

Adding an item to the dictionary

Dictionary functions

len()

str()

max()

min()

dict()

Dictionary methods

copy()

get()

setdefault()

has_key()

keys()

values()

update()

items()

clear()

Python dictionary with for loop

Practical program

Exercise

Summary

Control Statements and Loops

Control statements

The if and if...else statement

The if...elif...else statement

Loops

Types of loops

Definite loop

Indefinite loop

The while True and break statement

The break statement

Nested loops

The continue and pass statements

The pass statement

Summary

Function and Scope of Variable

Functions

Categories of functions

Built-in functions

User-defined functions

Function definition

Calling a function

Function with arguments

Function with an argument and return type

Function with default argument

Function with variable length argument

Key-value pair as variable length argument

Pass by reference versus pass by value

Scope of variables

Memory management

Summary

Modules and Packages

Modules

The import statement

Locating Python modules

Compiled Python files

The Python package

Summary

File Handling and Exceptions

Reading text from a file

The read() method

The readline() method

The readlines() method

Exercise

Writing text to a file

Examples

Pickling

Unpickling

Exceptions

The try statement with an except clause

Multiple exception blocks

The try...finally statement

The exception argument

Raising exceptions

User-defined exceptions

Summary

Collections

Collections

Counter

Update function

Usage of counters

Operations of Python collection counter

Deque

Populating deque

Deque consumption

Deque rotation

Ordered dictionary

Sorting of ordered dictionary based upon keys

Sorting of ordered dictionary based upon values

Default dictionary

Sample problem solved by the default dictionary - scenario one

Sample problem solved by the default dictionary - scenario two

Named tuple

Adding values and creating a dictionary

Summary

Class and Objects

Object-oriented programming overview

Key concepts

Creating a class

Instance variables

The __init__ method

Class variables

Class inheritance

Multiple inheritance

Multilevel inheritance

Overriding methods

Operator overloading

The class method

The static method

The private variable

Summary