* Remove six package from code and dependencies (remove support python2) * Use anonymous credentials by default instead of iam metadata (use ydb.driver.credentials_from_env_variables for creds by env var) * Close grpc streams while closing readers/writers * Add control plane operations for topic api: create, drop * Add six package to requirements
3.0.1b4
* Initial implementation of topic reader
3.0.1b3
* Fix error of check retriable error for idempotent operations (error exist since 2.12.1)
3.0.1b2
* Add initial topic writer
3.0.1b1
* start 3.0 beta branch
2.13.4
* fixed sqlalchemy get_columns method with not null columns