How Read a File Line by Line Into a List in Python

Submitted by razormist on Friday, January 10, 2025 - 23:50.

In this tutorial, we’ll learn how to program "How to Read a File Line by Line Into a List in Python." The objective is to safely and efficiently read a file's content line by line and store it into a list. This tutorial will demonstrate the process of reading the complete content of a text file while ensuring proper handling of resources. A sample program will be provided to guide you through the implementation step by step. So, let’s get started!

This topic is straightforward to understand. Just follow the instructions I provide, and you’ll be able to complete it with ease. The program I’ll demonstrate will show you the proper way to read a file line by line and store the lines into a list. So, let’s start coding!

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python https://www.python.org/downloads/.

Creating Main Function

This is the main function of the application. The following code will display a simple GUI in terminal console that will display program. To do this, simply copy and paste these blocks of code into the IDLE text editor.

with open("myfile.txt") as f:
    content_list = f.readlines()
 
 
 
while True:
    print("\n================= Read a File Line by Line Into a List =================\n\n")
    print(content_list)
 
 
    content_list = [x.strip() for x in content_list]
    print(content_list)
 
    opt = input("\nDo you want to try again?(yes/no): ")
 
    if opt.lower() == 'yes':
        ret=False
    elif opt.lower() == 'no':
        ret=True
        print("Exiting program....")
    else:
        print("Please enter yes/no:")
        break
 
    if ret == False:
        continue

The program reads the contents of a file (myfile.txt) line by line into a list using the readlines() method, strips any extra whitespace or newline characters from each line using a list comprehension, displays the processed and original lists, and allows the user to repeat the process or exit based on their input.

Output:

There you have it we successfully created How Read a File Line by Line Into a List in Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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