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Learn how to efficiently download `.zip` files using Python's Requests module, with practical examples and tips on handling files securely.
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How to Download and Save a .zip File in Python Using Requests

Downloading files over the internet is a common task for programmers, and using Python’s Requests library makes it quite straightforward. However, certain scenarios, such as downloading .zip files from private URLs, can present challenges. In this guide, we will explore a practical method for downloading a .zip file and saving it to a specific folder using Python. We will address the concerns that can arise, such as file size discrepancies during the download process.

Understanding the Problem

Suppose you have a private URL from which you can download a .zip file. When you access this URL via a web browser, it prompts you to either open or save the file. However, when trying to replicate this behavior with Python’s Requests module, you may run into issues such as:

The .zip file being larger than expected.

Difficulty specifying multiple cookie values and handling SSL verification.

Let's break down a basic approach to fix these issues effectively.

Step-by-Step Solution

1. Basic Code Structure for Downloading a File

To start, you need to have the Requests library installed. You can install it using pip if you haven't done so:

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Next, you can use the following basic code to download the file:

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2. Using pathlib for a Cleaner Approach

Python’s pathlib provides a more elegant way to handle file paths. Here is how you can achieve the download using pathlib:

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Using pathlib simplifies the path handling and improves the readability of your code.

3. Handling File Size Discrepancies

If you find that the downloaded file is larger than expected (by around 100KB), this could be due to several factors:

Incorrect Handling of Content: Ensure that you are writing the file in binary mode (wb) to prevent any unwanted data processing.

Chunk Size Management: Instead of downloading the entire file content at once, you might want to use chunked downloading as shown below:

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This method allows better control over the download process and can help ensure that you're only saving relevant data.

4. Using Cookies and SSL Verification

If your download requires cookies for authentication or if you need to bypass SSL verification, you can modify the request accordingly:

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Conclusion

By implementing the above methods, you can efficiently download and save .zip files using Python's Requests module, while also managing potential issues like file size discrepancies and handling authentication through cookies. Make sure to tailor the URLs and parameters according to your specific requirements.

Now you can save your .zip file directly to your preferred location with confidence!