Unzip — Extract To

This one is short and sweet and has its root in legacy and contemporary computing. It is never out of fashion!

Use Case: If you have ever done batch processing such as payroll, tax computations, very large scale ETL operations, real-time shares transactions then you would have sent a zip file at a secure location at some point for a big powerful computer to crunch and munch.

If you want to extract all the files from a zip file (security or PGP or hashes I leave to you), without relying on the third-party libraries, then this little piece of code is useful.

I used this fragment for a neural network implementation to batch process thousands of files.

Applies to

· Any zip file in the current folder location and extract it to a specific folder

Benefits

· No third-party library needed

· Implemented as a function so just include

When to use

· When you want to extract files from a zipped archive

Code fragment

import zipfile

def extract_from_zip(zip_filename_param: str, target_folder_param: str):
    print("Extracting...")
    with zipfile.ZipFile(zip_filename_param, 'r') as zf:
        print(f"\n\nCompressed file ({zip_filename_param}) contains following:\n{zf.namelist()}\n")
        extract_count = 0
        print("-" * 40)
        for the_file in zf.namelist():
            zf.extractall(target_folder_param)
            print(f"Extracting: ({the_file})")
            extract_count = extract_count + 1
    #
    print("-" * 40, f"\nTotal {extract_count} files processed")
    return

# run the function, assumes a zip file called t.zip that will be extracted in the root folder (sorry)
extract_from_zip("t.zip", "C:\\")