how we unzip nested zip file stored in ADLS gen2 using python script

Question

Hi All,

we are new in storage account Python SDK of blob storage. we are trying a workaround solution to unzip nested zip file that is stored in blob container. All zip files should be unzip and create a folder. We are new in blob storage SDK using python.

Is someone help, if we have any reference.

Answer 1

@manish verma Welcome to Microsoft Q&A Forum, Thank you for posting your query here!

I understand that you're looking for help with unzipping nested zip files stored in a blob container using the Python SDK for Azure Blob Storage. Here are a few steps and references that might help you get started:

1. Azure Blob Storage SDK for Python: You can refer to the official documentation for the Azure Blob Storage SDK for Python. It provides detailed information on how to interact with blob storage, including uploading, downloading, and managing blobs. You can find the documentation An external link was removed to protect your privacy.
2. Unzipping Nested Zip Files: To unzip nested zip files, you can use the zipfile module in Python. Here's a basic example to get you started:

import zipfile
import os
from azure.storage.blob import BlobServiceClient

# Initialize the BlobServiceClient
blob_service_client = BlobServiceClient.from_connection_string("your_connection_string")
container_name = "your_container_name"
blob_name = "your_blob_name.zip"

# Download the blob to a local file
local_file_name = "downloaded_blob.zip"
with open(local_file_name, "wb") as download_file:
    download_file.write(blob_service_client.get_blob_client(container_name, blob_name).download_blob().readall())

# Function to unzip files
def unzip_nested_zip(src_file, dest_dir):
    with zipfile.ZipFile(src_file, 'r') as zip_ref:
        zip_ref.extractall(dest_dir)
        for file in zip_ref.namelist():
            if file.endswith('.zip'):
                unzip_nested_zip(os.path.join(dest_dir, file), os.path.join(dest_dir, os.path.splitext(file)))

# Unzip the downloaded blob
unzip_nested_zip(local_file_name, "unzipped_folder")

Additional information:
Unzip nested zip files in python

Unzip file in blob storage with blob storage trigger

Python's zipfile: Manipulate Your ZIP Files Efficiently

from azure.storage.blob import BlobServiceClient
import zipfile
import io

# Set the connection string and container name
connection_string = "<your_connection_string>"
container_name = "<your_container_name>"

# Create a BlobServiceClient object
blob_service_client = BlobServiceClient.from_connection_string(connection_string)

# Get a reference to the container
container_client = blob_service_client.get_container_client(container_name)

# List all blobs in the container
blobs = container_client.list_blobs()

# Loop through each blob in the container
for blob in blobs:
    # Check if the blob is a zip file
    if blob.name.endswith('.zip'):
        # Download the zip file to memory
        blob_client = container_client.get_blob_client(blob.name)
        zip_data = blob_client.download_blob().readall()

        # Extract the zip file to a folder
        with zipfile.ZipFile(io.BytesIO(zip_data)) as zip_file:
            for nested_zip in zip_file.namelist():
                if nested_zip.endswith('.zip'):
                    with zipfile.ZipFile(io.BytesIO(zip_file.read(nested_zip))) as nested_zip_file:
                        nested_zip_file.extractall(nested_zip[:-4])

Please let us know if you have any further queries. I’m happy to assist you further.    

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