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.
Table of Contents (18 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
2
Type Variables and Operators

Dictionary methods


In this section, we will discuss the dictionary methods one by one. Consider that you want to create a copy of an existing dictionary; you can use the copy() method.

copy()

The syntax of the copy() method is as follows:

dict.copy() 

See the following example:

>>> Avengers ={'iron-man':"Tony", "CA":"Steve","BW":"Natasha"}
>>> Avengers
{'iron-man': 'Tony', 'CA': 'Steve', 'BW': 'Natasha'}
>>> Avengers2 = Avengers.copy()
>>> Avengers2
{'iron-man': 'Tony', 'CA': 'Steve', 'BW': 'Natasha'}
>>>

You can see that Avengers2 is an exact copy of Avengers. Do not confuse copy() with the assignment operator. Let's see the following example:

>>> A1 = {'iron-man':"Tony", "CA":"Steve","BW":"Natasha"}
>>> A2= A1
>>> 
>>> A2
{'iron-man': 'Tony', 'CA': 'Steve', 'BW': 'Natasha'}
>>> 
>>> CW= A1.copy()
>>> CW
{'iron-man': 'Tony', 'CA': 'Steve', 'BW': 'Natasha'}
>>>

Variable A1 and A2...