python - How to get list of folders in a given bucket using Google Cloud API

Python - How to get list of folders in a given bucket using Google Cloud API

To get a list of folders within a given bucket using the Google Cloud Storage API in Python, you can use the google-cloud-storage library, which is the official Python client for Google Cloud Storage. Here's a step-by-step guide on how to achieve this:

Step-by-Step Guide

1. Install the Google Cloud Storage Library

If you haven't already installed the library, you can do so using pip:

pip install google-cloud-storage

2. Set Up Authentication

Before using the Google Cloud Storage API, you need to set up authentication. If you haven't done so, follow these steps:

  • Go to the Google Cloud Console: https://console.cloud.google.com/

  • Create a new project or select an existing project.

  • Navigate to APIs & Services > Credentials.

  • Click on Create credentials > Service account key.

  • Select your service account, choose JSON as the key type, and click Create to download the JSON key file.

  • Set the environment variable GOOGLE_APPLICATION_CREDENTIALS to the path of your JSON key file:

    export GOOGLE_APPLICATION_CREDENTIALS="/path/to/your/json/keyfile.json"

3. List Folders in a Bucket

Here's how you can list folders (or "prefixes" in Google Cloud Storage terminology) within a bucket using the google-cloud-storage library:

from google.cloud import storage def list_folders(bucket_name): # Initialize the client client = storage.Client() # Get the bucket bucket = client.bucket(bucket_name) # List the folders (prefixes) folders = bucket.list_blobs(delimiter='/') # Extract the folder names from the prefixes folder_names = [folder.name[:-1] for folder in folders if folder.name.endswith('/')] return folder_names # Replace 'your-bucket-name' with your actual bucket name bucket_name = 'your-bucket-name' # List folders in the bucket folders = list_folders(bucket_name) print("Folders in bucket '{}' are: {}".format(bucket_name, folders))

Explanation

  • storage.Client(): Initializes the Google Cloud Storage client.
  • client.bucket(bucket_name): Retrieves the specified bucket.
  • bucket.list_blobs(delimiter='/'): Lists blobs (objects) in the bucket with a delimiter set to '/' to only list folders (prefixes).
  • folder.name[:-1]: Extracts the folder name by removing the trailing '/' from each folder prefix.

Notes

  • Google Cloud Storage does not have a native concept of "folders" like a file system; instead, it uses object names with '/' separators. Folders are implied by object names that contain '/'.
  • The code above lists prefixes (which act like folders) rather than checking actual folders in the bucket, as Google Cloud Storage does not have a direct API to list folders.

By following these steps and using the google-cloud-storage library, you can effectively list folders within a Google Cloud Storage bucket using Python. Adjust the list_folders function as needed to fit your specific requirements or error handling needs.

Examples

  1. List folders in Google Cloud Storage bucket using Python

    • Description: Learn how to programmatically list folders (directories) within a specific Google Cloud Storage bucket using Python and the Google Cloud Storage API.
    • Code:
      from google.cloud import storage def list_folders(bucket_name): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name, delimiter='/') folders = set() for blob in blobs: if '/' in blob.name: folders.add(blob.name.split('/')[0]) return list(folders) bucket_name = 'your-bucket-name' folder_list = list_folders(bucket_name) print("Folders in bucket {}: {}".format(bucket_name, folder_list))

  2. Google Cloud Storage API Python list directories

    • Description: How to use the Google Cloud Storage API with Python to retrieve a list of directories (folders) from a specified bucket.
    • Code:
      from google.cloud import storage def list_directories(bucket_name): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name, delimiter='/') directories = blobs.prefixes return directories bucket_name = 'your-bucket-name' directory_list = list_directories(bucket_name) print("Directories in bucket {}: {}".format(bucket_name, directory_list))

  3. Python get list of folders Google Cloud Storage

    • Description: Step-by-step guide to fetching a list of folders (directories) from a Google Cloud Storage bucket using Python and Google Cloud SDK.
    • Code:
      from google.cloud import storage def get_folders(bucket_name): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name) folders = set() for blob in blobs: if '/' in blob.name: folders.add(blob.name.split('/')[0]) return list(folders) bucket_name = 'your-bucket-name' folder_list = get_folders(bucket_name) print("Folders in bucket {}: {}".format(bucket_name, folder_list))

  4. Python Google Cloud Storage list directories

    • Description: Tutorial on using Python to list directories (folders) in a Google Cloud Storage bucket, leveraging the Google Cloud Storage Python library.
    • Code:
      from google.cloud import storage def list_gcs_directories(bucket_name): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name, delimiter='/') directories = blobs.prefixes return directories bucket_name = 'your-bucket-name' directories = list_gcs_directories(bucket_name) print("Directories in bucket {}: {}".format(bucket_name, directories))

  5. Google Cloud Storage Python list folders example

    • Description: Example demonstrating how to list folders (directories) in a Google Cloud Storage bucket using Python code and the Google Cloud Storage API.
    • Code:
      from google.cloud import storage def list_folders(bucket_name): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name) folders = set() for blob in blobs: if '/' in blob.name: folders.add(blob.name.split('/')[0]) return list(folders) bucket_name = 'your-bucket-name' folder_list = list_folders(bucket_name) print("Folders in bucket {}: {}".format(bucket_name, folder_list))

  6. Python Google Cloud Storage list subdirectories

    • Description: Guide to listing subdirectories (folders) within a Google Cloud Storage bucket using Python and the Google Cloud SDK.
    • Code:
      from google.cloud import storage def list_subdirectories(bucket_name, prefix=''): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name, prefix=prefix, delimiter='/') subdirectories = blobs.prefixes return subdirectories bucket_name = 'your-bucket-name' subdirectory_list = list_subdirectories(bucket_name) print("Subdirectories in bucket {}: {}".format(bucket_name, subdirectory_list))

  7. Python Google Cloud Storage list folders

    • Description: How to programmatically list folders (directories) from a Google Cloud Storage bucket using Python code and the Google Cloud Storage API.
    • Code:
      from google.cloud import storage def list_folders(bucket_name): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name) folders = set() for blob in blobs: if '/' in blob.name: folders.add(blob.name.split('/')[0]) return list(folders) bucket_name = 'your-bucket-name' folder_list = list_folders(bucket_name) print("Folders in bucket {}: {}".format(bucket_name, folder_list))

  8. Google Cloud Storage Python API list directories

    • Description: Example of using the Google Cloud Storage Python API to list directories (folders) within a specific bucket.
    • Code:
      from google.cloud import storage def list_directories(bucket_name): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name, delimiter='/') directories = blobs.prefixes return directories bucket_name = 'your-bucket-name' directories = list_directories(bucket_name) print("Directories in bucket {}: {}".format(bucket_name, directories))

  9. Google Cloud Storage Python get list of folders

    • Description: How to retrieve a list of folders (directories) from a Google Cloud Storage bucket using Python and the Google Cloud Storage client library.
    • Code:
      from google.cloud import storage def get_folders(bucket_name): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name) folders = set() for blob in blobs: if '/' in blob.name: folders.add(blob.name.split('/')[0]) return list(folders) bucket_name = 'your-bucket-name' folder_list = get_folders(bucket_name) print("Folders in bucket {}: {}".format(bucket_name, folder_list))

  10. Google Cloud Storage list folders Python

    • Description: Tutorial on how to use Python to list folders (directories) in Google Cloud Storage, including code snippets and explanations.
    • Code:
      from google.cloud import storage def list_folders(bucket_name): storage_client = storage.Client() blobs = storage_client.list_blobs(bucket_name) folders = set() for blob in blobs: if '/' in blob.name: folders.add(blob.name.split('/')[0]) return list(folders) bucket_name = 'your-bucket-name' folder_list = list_folders(bucket_name) print("Folders in bucket {}: {}".format(bucket_name, folder_list))

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