Google Cloud Storage list the directories or folders within a given bucket and path (not including objects!)

gcs_list_directories.py

from google.api_core import page_iterator
from google.cloud import storage

def _item_to_value(iterator, item):
    return item

def list_directories(bucket_name, path):
    if not path.endswith('/'):
        path += '/'

    extra_params = {
        "projection": "noAcl",
        "prefix": path,
        "delimiter": '/'
    }

    gcs = storage.Client()

    path = "/b/" + bucket_name + "/o"

    iterator = page_iterator.HTTPIterator(
        client=gcs,
        api_request=gcs._connection.api_request,
        path=path,
        items_key='prefixes',
        item_to_value=_item_to_value,
        extra_params=extra_params,
    )

    return [x for x in iterator]

bucket_name = 'rfcx-models-dev'
path = 'dog-bark/datasets/v2/train_set/'
print(list_directories(bucket_name, path))