Python: Extract Gz Files With And Honor Original Filenames And File Extensions

Under a folder, I have many .gz files and within these gz files some are .txt, some are .csv, some are .xml, or some other extensions. E.g. gz (the original/compressed file in()) f

Solution 1:

import gzip
import os


INPUT_DIRECTORY = 'C:\Xiang'
OUTPUT_DIRECTORY = 'C:\UnZipGz'
GZIP_EXTENSION = '.gz'defmake_output_path(output_directory, zipped_name):
    """ Generate a path to write the unzipped file to.

    :param str output_directory: Directory to place the file in
    :param str zipped_name: Name of the zipped file
    :return str:
    """
    name_without_gzip_extension = zipped_name[:-len(GZIP_EXTENSION)]
    return os.path.join(output_directory, name_without_gzip_extension)


for file in os.scandir(INPUT_DIRECTORY):
    ifnot file.name.lower().endswith(GZIP_EXTENSION):
        continue

    output_path = make_output_path(OUTPUT_DIRECTORY, file.name)

    print('Decompressing', file.path, 'to', output_path)

    with gzip.open(file.path, 'rb') as file:
        withopen(output_path, 'wb') as output_file:
            output_file.write(file.read())

Explanation:

1. Iterate through all files in the folder with the relevant extension.
2. Generate a path to the new directory without the gzip extension.
3. Open the file and write its decompressed contents to the new path.

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To retrieve the original file name, you can use gzinfo: https://github.com/PierreSelim/gzinfo

>>> import gzinfo
>>> info = gzinfo.read_gz_info('bar.txt.gz')
>>> info.fname
'foo.txt'

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References to extract original file name:

• https://superuser.com/questions/859785/is-gzip-supposed-to-honor-original-filename-during-decompress
• How to get the name of the original file from a .gz archive?