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Learn Python in 7 Days

Learn Python in 7 Days

By : Das
1.5 (2)
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Learn Python in 7 Days

Learn Python in 7 Days

1.5 (2)
By: Das

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 (12 chapters)
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2
Type Variables and Operators

Python dictionary with for loop


In this section, we will learn how to use the for loop with a dictionary. If you have not read about the for loop so far, you can skip this section and get back after learning about the for loop, covered in Chapter 6, Control Statements and Loops. Let's apply the for loop to a dictionary. See the following program named forloopkey.py:

port1 = {21: "FTP", 22 :"SSH", 23: "telnet", 80: "http"} for each in port1: print each

The output is as follows:

Output of program forloopkey.py

The preceding program prints only the keys of the dictionary. If you want to print the key as well as the value, then you can use the items() method. See the following program named forloopitems.py:

port1 = {21: "FTP", 22 :"SSH", 23: "telnet", 80: "http"}
 for k,v in port1.items():
     print k," : ", v

The following screenshot shows the output of the program:

Output of program forloopitems.py

The preceding program seems difficult to understand at first. Let's break the program into two parts...

Visually different images
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Learn Python in 7 Days
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