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Learn Python in 7 Days
Learn Python in 7 Days

Learn Python in 7 Days: Begin your journey with Python

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Learn Python in 7 Days

Type Variables and Operators

In the last chapter, you learned a little bit about the history of Python. You learned the steps to install Python and some basic syntax of the language. In the basic syntax, you learned about types of comments that can be used in the code, various types of quotes, escape sequence that can be handy, and finally, you learned about the formatting of strings. In this chapter, you will learn about assignment statements, arithmetic operators, comparison operators, assignment operators, bitwise operators, logical operators, membership operators, and identity operators.

Variables

So, what is a variable? Consider that your house needs a name. You place a nameplate at the front gate of your house. People will now recognize your house through that nameplate. That nameplate can be considered as variable. Like a nameplate points to the house, a variable points to the value that is stored in memory. When you create a variable, the interpreter will reserve some space in the memory to store values. Depending on the data type of the variable, the interpreter allocates memory and makes a decision to store a particular data type in the reserved memory. Various data types, such as integers, decimals, or characters, can be stored by assigning different data types to the variables. Python variables are usually dynamically typed, that is, the type of the variable is interpreted during runtime and you need not specifically provide a type to the variable name, unlike what other programming...

Operators

Python supports the following types of operators:

  • Arithmetic operators.
  • Comparison operators
  • Assignment operators
  • Bitwise operators
  • Logical operators
  • Membership operators
  • Identity operators

Arithmetic operators

Arithmetic expressions comprise operands and operators:

Operator

Description

**

Exponent: Performs exponential (power) calculations on operands

*

Multiplication: Performs multiplication between operands

/

Division: Performs division between operands

%

Modulus: Performs modulus division between operands

+

Addition: Performs addition between operands

-

Subtraction: Performs subtraction between operands

We have already discussed the precedence order of the operators.

...

Summary

In this chapter, you learned about various data types available in Python and the naming conventions required. You also learned about the Python character set and about converting a character set to ASCII code and vice versa, using ord() and chr() methods available in the language. In the next chapter, you will learn about two different data types, namely string and tuples.

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Key benefits

  • Make the best of Python features
  • Learn the tinge of Python in 7 days
  • Learn complex concepts using the most simple examples

Description

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.

Who is this book for?

The book is aimed at aspiring developers and absolute novice who want to get started with the world of programming. We assume no knowledge of Python for this book.

What you will learn

  • Use if else statement with loops and how to break, skip the loop
  • Get acquainted with python types and its operators
  • Create modules and packages
  • Learn slicing, indexing and string methods
  • Explore advanced concepts like collections, class and objects
  • Learn dictionary operation and methods
  • Discover the scope and function of variables with arguments and return value
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Publication date, Length, Edition, Language, ISBN-13
Publication date : May 25, 2017
Length: 280 pages
Edition : 1st
Language : English
ISBN-13 : 9781787288386
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Estimated delivery fee Deliver to Malaysia

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Product Details

Publication date : May 25, 2017
Length: 280 pages
Edition : 1st
Language : English
ISBN-13 : 9781787288386
Category :
Languages :

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Table of Contents

11 Chapters
Getting Started with Python Chevron down icon Chevron up icon
Type Variables and Operators Chevron down icon Chevron up icon
Strings Chevron down icon Chevron up icon
Lists Chevron down icon Chevron up icon
Dictionary Chevron down icon Chevron up icon
Control Statements and Loops Chevron down icon Chevron up icon
Function and Scope of Variable Chevron down icon Chevron up icon
Modules and Packages Chevron down icon Chevron up icon
File Handling and Exceptions Chevron down icon Chevron up icon
Collections Chevron down icon Chevron up icon
Class and Objects Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Half star icon Empty star icon Empty star icon Empty star icon 1.5
(2 Ratings)
5 star 0%
4 star 0%
3 star 0%
2 star 50%
1 star 50%
DNAunion Dec 26, 2017
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
Although published in 2017, this book does not cover the latest version of Python, and explicitly stated:"For this book, you need to install Python 2.7x version on your machine, along with a simpletext editor (Notepad or Notepad++). All the examples are meant to be run on the Python 2.7version and will not work in Python 3.x versions."This is very strange considering that Python 3 has been out since 2008, and Python.org says "Short version: Python 2.x is legacy, Python 3.x is the present and future of the language "I am getting a big disgusted with Packt books.
Amazon Verified review Amazon
Ann Oct 27, 2017
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Very poorly explained and full of errors
Amazon Verified review Amazon
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