Copy Between ZIP Files with Python

inter_zip_copy.py

import os
import os.path
from pathlib import Path
import zipfile

"""
ZIP_Alpha.zip and ZIP_Beta.zip contain the following files respectively.

./demo/
├── ZIP_Alpha -> ZIP_Alpha.zip
│   ├── A.txt
│   ├── B.txt
│   └── C.txt
└── ZIP_Beta  -> ZIP_Beta.zip
    ├── docs
    │   └── readme.md
    ├── D.txt
    ├── E.txt
    └── F.txt

3 directories, 7 files
"""


ZIP_Root = Path(r'/tmp/demo')
ZIP_Alpha = ZIP_Root / 'ZIP_Alpha.zip'
ZIP_Beta = ZIP_Root / 'ZIP_Beta.zip'


def copy_from_zip_to_zip(source_zip: os.PathLike, target_zip: os.PathLike, skip_existing=True):
    with zipfile.ZipFile(source_zip, 'r') as source_archive:
        with zipfile.ZipFile(target_zip, 'a') as target_archive:
            for file in source_archive.infolist():
                if skip_existing and zipfile.Path(target_archive, file.filename).exists():
                    print(f"File '{file.filename}' already exists in target archive. Skipping...")
                else:
                    target_archive.writestr(file, source_archive.open(file).read())

if __name__ == '__main__':
    copy_from_zip_to_zip(ZIP_Beta, ZIP_Alpha)