class_docstr: Interact with Weaviate database to store vectors. This hook uses the 'conn_id'.
  
  :param conn_id: The connection id to use when connecting to Weaviate. <howto/connection:weaviate>
class_docstr_tok: ["Interact","with","Weaviate","database","to","store","vectors",".","This","hook","uses","the","'conn_id","'",".",":","param","conn_id",":","The","connection","id","to","use","when","connecting","to","Weaviate",".","<","howto\/connection",":","weaviate",">"]
docstr: Deletes all or specific classes if class_names are provided.
  
  :param class_names: list of class names to be deleted.
  :param if_error: define the actions to be taken if there is an error while deleting a class, possible
   options are `stop` and `continue`
  :return: if `if_error=continue` return list of classes which we failed to delete.
      if `if_error=stop` returns None.
code: def delete_classes(
      self, class_names: list[str] | str, if_error: str = "stop"
  ) -> list[str] | None:
      """Deletes all or specific classes if class_names are provided.
  
      :param class_names: list of class names to be deleted.
      :param if_error: define the actions to be taken if there is an error while deleting a class, possible
       options are `stop` and `continue`
      :return: if `if_error=continue` return list of classes which we failed to delete.
          if `if_error=stop` returns None.
      """
      client = self.get_client()
      class_names = (
          [class_names]
          if class_names and isinstance(class_names, str)
          else class_names
      )
  
      failed_class_list = []
      for class_name in class_names:
          try:
              for attempt in Retrying(
                  stop=stop_after_attempt(3),
                  retry=(
                      retry_if_exception(
                          lambda exc: check_http_error_is_retryable(exc)
                      )
                      | retry_if_exception_type(
                          REQUESTS_EXCEPTIONS_TYPES
                      )
                  ),
              ):
                  with attempt:
                      print(attempt)
                      client.schema.delete_class(class_name)
          except Exception as e:
              if if_error == "continue":
                  self.log.error(e)
                  failed_class_list.append(class_name)
              elif if_error == "stop":
                  raise e
  
      if if_error == "continue":
          return failed_class_list
      return None
  
imports: from __future__ import annotations
  import contextlib
  import json
  import warnings
  from functools import cached_property
  from typing import TYPE_CHECKING, Any, Dict, List, Sequence, cast
  import requests
  import weaviate.exceptions
  from tenacity import Retrying, retry, retry_if_exception, retry_if_exception_type, stop_after_attempt
  from weaviate import Client
  from weaviate.auth import AuthApiKey, AuthBearerToken, AuthClientCredentials, AuthClientPassword
  from weaviate.data.replication import ConsistencyLevel
  from weaviate.exceptions import ObjectAlreadyExistsException
  from weaviate.util import generate_uuid5
  from airflow.exceptions import AirflowProviderDeprecationWarning
  from airflow.hooks.base import BaseHook
label_desc: Use image node_id 12 for calling the WeaviateHook obj's underlying member method code with example usage: obj.delete_classes(class_names, if_error) and returns: None, failed_class_list