[FIXED] unable unzip password protected .gz file in GCS bucket using Python

Issue

Trying to unzip password protected file in GCS but getting error in below code. Below code work fine with normal .gz files but fails to unzip password protected files.

storage_client = storage.Client()
source_bucket = 'bucket'
source_bucket1 = storage_client.bucket(source_bucket)
blob = source_bucket1.blob("path/filename.gz")
zipbytes = io.BytesIO(blob.download_as_string())
        print(zipbytes)
        if is_zipfile(zipbytes):
            with ZipFile(zipbytes, 'r') as myzip:
                for contentfilename in myzip.namelist():
                    contentfile = myzip.read(contentfilename)
                    contentfilename = contentfilename[:-3]
                    blob1 = bucket.blob(contentfilename)
                    blob1.upload_from_string(contentfile)
                    print(f'File decompressed from {zipfilename_with_path} to {contentfilename}')
        blob.delete()

Solution

Am able to read .csv.gz password protected file using below logic. All of this is done in memory. It has performance issue if the file is huge but works fine.

        storage_client = storage.Client()
        source_bucket = '<bucket-name>'
        source_bucket1 = storage_client.bucket(source_bucket)
        bukcet_folder = '/unzip'
        blob = source_bucket1.blob(path)
        zipbytes = io.BytesIO(blob.download_as_string())
        with ZipFile(zipbytes, 'r') as myzip:
            print("Inside the zipfiles loop")
            with myzip.open('filename.csv',pwd=b'password') as myfile:
                print("Inside zip 2 loop")
                contentfile = myfile.read()
                contentfilename = bucket_folder + destination_file_path
                blob1 = source_bucket1.blob(contentfilename)
                blob1.upload_from_string(contentfile)
              ```

Answered By - abhi