Скачать или смотреть How to Sort glob.glob Results Containing Numbers in Python

Discover how to achieve a more logical sorting of glob.glob results in Python with this easy-to-follow guide!
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A Comprehensive Guide to Sorting glob.glob Results with Numbers in Python

When working with log files or similar data, it's common to encounter filenames that contain both text and numbers. However, sorting such filenames using the default functionalities in Python can lead to unexpected results. For instance, if you use the glob module to fetch your log files, the output may look disorganized, showing files in a manner that doesn't intuitively meet your expectations.

The Problem You Face

Using the following command:

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yields an unsorted list of filenames like:

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Even when applying the sorted() function:

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you still end up with a list such as:

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This list is not sorted in numerical order, which can be frustrating.

The Solution Overview

To achieve the desired sorting order—it’s essential to create a custom sorting function. This function will look for the first sequence of digits in the filenames and use both the numerical value and the entire filename as sorting keys. Here is how to implement this effectively.

Step-by-Step Breakdown of the Solution

Import Required Library
We will need the re module for regular expressions.

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Define Your Filename List
Here, we prepare a list of filenames to sort.

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Create a Regular Expression
You will need a regex pattern to extract numbers from the filenames.

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Define the Sorting Key Function
Create a function that will determine the keys to sort by. This function uses regex to find the numbers and returns them as an integer for accurate sorting, alongside the original filename to maintain order for entries without numbers.

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Perform The Sorting
Now, you can sort your list using the custom key function and print the results.

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Run the Code

When you run the complete code snippet provided, you can expect the files to be sorted logically as follows:

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Conclusion

Sorting filenames that contain numbers can be done efficiently in Python with the aid of regular expressions and custom sorting logic. By following the steps outlined above, you can ensure that your file lists are ordered in a way that makes intuitive sense and aligns with numeric expectations. If you frequently deal with similar scenarios, adapting this approach will save you time and will enhance your coding efficiency.

Happy coding!