Book Image

Learn Python in 7 Days

Book Image

Learn Python in 7 Days

Overview of this book

Python is a great language to get started in the world of programming and application development. This book will help you to take your skills to the next level having a good knowledge of the fundamentals of Python. We begin with the absolute foundation, covering the basic syntax, type variables and operators. We'll then move on to concepts like statements, arrays, operators, string processing and I/O handling. You’ll be able to learn how to operate tuples and understand the functions and methods of lists. We’ll help you develop a deep understanding of list and tuples and learn python dictionary. As you progress through the book, you’ll learn about function parameters and how to use control statements with the loop. You’ll further learn how to create modules and packages, storing of data as well as handling errors. We later dive into advanced level concepts such as Python collections and how to use class, methods, objects in python. By the end of this book, you will be able to take your skills to the next level having a good knowledge of the fundamentals of Python.

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Table of Contents (18 chapters)
Title Page
Title Page
Credits
Credits
About the Authors
About the Authors
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Customer Feedback
Customer Feedback
Preface
Preface
Free Chapter
1
Getting Started with Python
Getting Started with Python
Why Python?
Installation
Notepad++ installation
Writing a simple Hello World! program 
Basic Python syntax
Summary
2
Type Variables and Operators
Type Variables and Operators
Variables
Operators
Summary
3
Strings
Strings
Python strings
Slicing for substrings
Python string methods
String functions 
Tuple
Tuple functions
Operations of tuples
Exercise
Summary 
4
Lists
Lists
Creating a list
List operations
in operator
List functions
List methods
List comprehensions
Exercises
Summary
5
Dictionary
Dictionary
Overview of dictionary
Operations on the dictionary
Dictionary functions
Dictionary methods
Python dictionary with for loop
Exercise
Summary
6
Control Statements and Loops
Control Statements and Loops
Control statements
The if and if...else statement
The if...elif...else statement
Loops
Summary
7
Function and Scope of Variable
Function and Scope of Variable
Functions
Pass by reference versus pass by value
Scope of variables
Memory management
Summary
8
Modules and Packages
Modules and Packages
Modules 
The import statement
Locating Python modules
Compiled Python files
The Python package
Summary
9
File Handling and Exceptions
File Handling and Exceptions
Reading text from a file 
Writing text to a file
Pickling
Unpickling
Exceptions
Summary
10
Collections
Collections
Collections
Summary
11
Class and Objects
Class and Objects
Object-oriented programming overview
Instance variables
The __init__ method
Class variables
Class inheritance
Overriding methods
Operator overloading
The class method
The static method
The private variable
Summary

List operations

In this section, you will learn slicing, accessing, adding, deleting, and updating the values in a list.

Accessing list values

In order to access list values, use list names with positional index in square brackets. For example, consider the following code snippet:

>>> Avengers = ['hulk', 'iron-man', 'Captain', 'Thor']

>>> Avengers[0]

'hulk'

>>> Avengers[3]

'Thor'

>>> Avengers[-1]

'Thor'

>>> Avengers[4]

Traceback (most recent call last):

  File "<pyshell#5>", line 1, in <module>

    Avengers[4]

IndexError: list index out of range

If the desired index is not found in the list, then the interpreter throws IndexError.

Slicing the list

The slicing of a list is the same as we did in tuples. See the syntax:

<list-name>[start : stop : step]

See the example:

>>> Avengers[1:3]

['iron-man', 'Captain']

>>> Avengers[:4]

['hulk', 'iron-man', 'Captain', 'Thor']

>>> Avengers[:]

['hulk', 'iron...
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