What is the purpose of unzipping in Python?

The `unzip()` function in Python is used to decompress files. It can extract compressed files (such as those in zip, tar, gztar, bztar, and xztar formats) into their original files or directories.

The unzip() function in Python makes it convenient to decompress compressed files in order to access their content, which is especially useful for dealing with a large number of files or directories, or when needing to extract specific files from a compressed file.

Here is a simple example of using the unzip() function to decompress a zip file:

import zipfile

zip_file = 'example.zip'
output_dir = 'output'

with zipfile.ZipFile(zip_file, 'r') as zip_ref:
    zip_ref.extractall(output_dir)

In this example, the ZipFile() function is first used to open the compressed file, and then the extractall() method is used to extract all content from the file to the specified output directory.

It is important to note that the unzip() function requires the use of the zipfile module for operation, so it needs to be imported before use.