Скачать или смотреть Why Can’t I Unzip a Zipped File with Python’s zipfile? Here’s the Solution!

Struggling to unzip a zipped file using Python's zipfile module? Discover the common mistake and how to implement the right solution.
---
This video is based on the question https://stackoverflow.com/q/62806941/ asked by the user 'aishuchen' ( https://stackoverflow.com/u/12014325/ ) and on the answer https://stackoverflow.com/a/62807411/ provided by the user 'Dennis Sparrow' ( https://stackoverflow.com/u/13651028/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Why I Cannot unzip a zipped file by python zipfile?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Why Can’t I Unzip a Zipped File with Python’s zipfile?

Working with zipped files in Python can sometimes lead to perplexing issues, especially when using the zipfile module. One common question that arises is, "Why can’t I unzip a zipped file I've created?" This post aims to illuminate the problem and guide you toward the right solution.

The Problem

In the provided code, two methods were presented for unzipping a file using the zipfile module. The first method works perfectly, while the second method results in an unusable zip file. Let's examine the code snippets to understand why.

Method No. 1:

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

Method No. 2:

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

Why the Issue Arises

The second method fails because of the timing of when the zip file is closed. The call to my_zip.close() is critical for finalizing the contents of the zip file. In Method No. 2, this call occurs after writing the buffer to the file, causing the written file to be unusable. Here's an outline of the main reasons for the failure:

Order of Operations: The output zip file is written to before the my_zip object is closed.

Finalization of the Zip Object: If my_zip is not closed before accessing its buffer for writing, the output file will not be structured properly.

The Solution

To rectify this issue, simply rearranging code allows for the proper closure of the zip object before outputting its content.

Steps to Fix

Close the Zip Object Before Writing: Move the my_zip.close() line to a place before writing the contents of zip_buffer.

Execute the Close: Ensure all resources are released properly to avoid any potential file corruption.

Here's the revised code snippet reflecting the changes:

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

Conclusion

By ensuring that the zip file is closed before attempting to write its contents to disk, you can avoid the pitfall of ending up with an unusable zip file. Understanding the order of operations in programming is crucial, especially when dealing with file manipulations.

Happy coding, and may your zipped files always unzip smoothly!