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Learn how to easily read multiple text files from a folder and save the results to another folder in Python with this helpful guide.
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How to Read Files from a Folder and Save Results in Another Folder Using Python

Are you struggling with reading multiple files from a folder and saving the processed results into another folder using Python? If so, you're in the right place! This guide is designed to walk you through the process of efficiently reading from a directory of files and writing output to a specified directory—all with ease. Let's dive into the details.

Understanding the Problem

When you work with text files in Python, it's often necessary to automate the processing of multiple files at once. However, many new Python users find themselves having to manually input each file's path, which can be time-consuming and prone to error. The goal here is to eliminate that hassle by enabling your program to read all the .txt files in a specific folder and save the results to a different folder, all in one go.

Solution Overview

To achieve this, we'll be using the following Python libraries:

glob: To retrieve the paths of all .txt files in a specified directory.

os: To facilitate file path operations and manipulations.

The built-in re library to perform regular expression operations.

Let’s get started by breaking down the solution step-by-step.

Step 1: Importing Required Libraries

First, you need to import the necessary libraries in your script. This can be easily done at the beginning of your Python file:

[[See Video to Reveal this Text or Code Snippet]]

Here, glob provides a convenient way to find all the pathnames matching a specified pattern, while os is used for interacting with the operating system, and re is for regex operations.

Step 2: Finding Files in the Source Directory

Now, let’s gather all the .txt files in your source directory using glob:

[[See Video to Reveal this Text or Code Snippet]]

This line of code will create a list called books, which contains the paths to all the text files in the specified source directory.

Step 3: Writing the Frequency Function

Next, we will encapsulate your original functionality into a function that processes the text and writes the result to an output file:

[[See Video to Reveal this Text or Code Snippet]]

This function takes the text string from a reading file and the desired output file name as arguments. It counts the occurrences of words matching a specific pattern and appends this data to the output file.

Step 4: Reading From Each Book and Writing the Results

Now, we need to iterate through each book file and apply the writer function to process and save the results:

[[See Video to Reveal this Text or Code Snippet]]

In this loop:

We extract the name of each book from its path.

We open the book file, read its contents and pass it to the writer function along with the designated output file path for saving results.

Conclusion

With the solutions detailed above, you can easily read text files from a folder and save the processed results into another folder using Python. This approach not only makes your code cleaner and manageable but also drastically improves efficiency, particularly when working with numerous files.

Feel free to experiment with this code and modify it according to your specific needs. Happy coding!