class_docstr: This handler handles connection and execution of the Weaviate statements.
class_docstr_tok: ["This","handler","handles","connection","and","execution","of","the","Weaviate","statements","."]
docstr: Connect to a weaviate database.
docstr_tok: ["Connect","to","a","weaviate","database","."]
code: def connect(self):
      """Connect to a weaviate database."""
      if self.is_connected:
          return self._client
  
      try:
          self._client = self._get_client()
          self.is_connected = True
          return self._client
      except Exception as e:
          logger.error(f"Error connecting to weaviate client, {e}!")
          self.is_connected = False
  
imports: from collections import OrderedDict
  from datetime import datetime
  from typing import List, Optional
  import weaviate
  from weaviate.embedded import EmbeddedOptions
  import pandas
  from mindsdb.integrations.libs.const import HANDLER_CONNECTION_ARG_TYPE
  from mindsdb.integrations.libs.response import RESPONSE_TYPE
  from mindsdb.integrations.libs.response import HandlerResponse
  from mindsdb.integrations.libs.response import HandlerResponse
  from mindsdb.integrations.libs.response import HandlerStatusResponse
  from mindsdb.integrations.libs.vectordatabase_handler import FilterCondition, FilterOperator, TableField, VectorStoreHandler
  from mindsdb.utilities import log
  from weaviate.util import generate_uuid5
label_desc: Use image node_id 4 for calling the WeaviateDBHandler obj's underlying member method code with example usage: obj.connect() and returns: self, self