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

Writing text to a file


In this section, we will learn how to write a new file using Python.

This time we'll use the write mode 'w' in open(). The 'w' mode creates a new file. If the file already exists, then the file would be overwritten.  We will use the write() function.

Let's discuss the code in filewrite1.py:

file_input = open("motivation.txt",'w')
file_input.write("Never give up")
file_input.write("nRise above hate")
file_input.write("nNo body remember second place")
file_input.close()

You can see that I have written the famous WWE star John Cena's quotes.

Let's see the output:

Output of code filewrite.py

We wrote lines one by one by adding a new line character n.  You can supply all of them in one go as shown here:

file_input = open("motivation.txt",'w')
file_input.write("Never give up nRise above hate nNo body remember second place")
file_input.close()

Next, I will use the writelines() function. This method writes a Python list of strings to a file.

Let's see the code:

list1 = ["Blood sweat...