import os
import traceback
from obs import ObsClient, Versions

obsClient = ObsClient(
	access_key_id = ak,
	secret_access_key = sk,
	server = endpoint
)

mark = None
index = 1

listing = obsClient.listVersions(
			bucket,
			version = Versions(
				prefix = prefiks,
				encoding_type = 'url',
				key_marker = mark,
				max_keys = 1000
			)
		)

print(listing)