How to Reverse a TXT File in Python 3.8
Learn how to easily `reverse` the contents of a text file using Python 3.8 in just a few steps. Perfect for beginner programmers!
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This video is based on the question https://stackoverflow.com/q/72864733/ asked by the user 'Teriyaki' ( https://stackoverflow.com/u/19452488/ ) and on the answer https://stackoverflow.com/a/72864818/ provided by the user 'Park' ( https://stackoverflow.com/u/1779532/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.
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How to Reverse a TXT File in Python 3.8
Have you ever faced a situation where you needed to reverse the contents of a text file in Python? Whether you’re working on managing literature, compiling code, or just experimenting with data structures, reversing the content can be an intriguing challenge. In this guide, we’ll walk through how to reverse the order of lines from multiple text files and save that reversed order into a new file using Python 3.8.
Understanding the Problem
Let’s assume you have three text files named pushkin.txt, romeo.txt, and byron.txt, each containing some text. The goal is to combine the contents of these three files into a new file, poems.txt, and then reverse the order of the lines so that the last line of the input files becomes the first line in the output file.
For example, if the combined content looks like this:
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It should look like this in the output file:
[[See Video to Reveal this Text or Code Snippet]]
Step-by-Step Solution
Here, we’ll break down the solution into clear sections.
1. Read the Files
First, we need to read the contents from each of the text files. We’ll store the lines of these files within a list, which allows us to manipulate the data more easily.
[[See Video to Reveal this Text or Code Snippet]]
2. Reverse the Order
After gathering the content of the files into the list called data, we use the reverse() method to change the order of the lines in the list.
[[See Video to Reveal this Text or Code Snippet]]
3. Write to a New File
Finally, we’ll write the reversed lines into a new text file called result.txt. We need to join the list back into a single string before writing it out.
[[See Video to Reveal this Text or Code Snippet]]
Final Result
After running this complete script, the content of result.txt will be:
[[See Video to Reveal this Text or Code Snippet]]
Conclusion
Reversing the contents of a text file in Python is quite simple and can be accomplished in just a few steps. This method is especially handy when dealing with multiple files and looking to compile data in a specific order. With just a few lines of code, you have not only learned how to reverse text file contents but also enhanced your Python programming skills!
Now it's time to try it out yourself! Happy coding!
