KnowledgeGraphQueryEngine. So whenever I am trying to run a query using the KnowledgeGraphQueryEngine , I am continuously getting this error:pydantic.v1.error_wrappers.ValidationError: 1 validation error for LLMPredictStartEvent template none is not an allowed value (type=type_error.none.not_allowed)
query_engine = KnowledgeGraphQueryEngine(
storage_context=storage_context,
llm=llm,
verbose=True,
)
response = query_engine.query("Tell me about Peter Quill?")Got a larger chunk overlap (-3) than chunk size (-39), should be smaller.def initialize_index():
global index
llm_predictor = HuggingFaceLLMPredictor(
max_input_size=512,
max_new_tokens=512,
tokenizer_name="facebook/opt-iml-max-1.3b",
model_name="facebook/opt-iml-max-1.3b",
model_kwargs={"load_in_8bit": True},
generate_kwargs={
"do_sample": True,
"top_k": 4,
"penalty_alpha": 0.6,
}
)
prompt_helper = PromptHelper(context_window=512, chunk_size_limit=256, num_output=512)
embed_model = LangchainEmbedding(HuggingFaceEmbeddings())
service_context = ServiceContext.from_defaults(llm_predictor=llm_predictor, embed_model=embed_model,
prompt_helper=prompt_helper)
if os.path.exists("../indices"):
storage_context = StorageContext.from_defaults(persist_dir="../indices")
index = load_index_from_storage(storage_context=storage_context,
service_context=service_context)
else:
storage_context = StorageContext.from_defaults()
documents = SimpleDirectoryReader("../data").load_data()
index = GPTListIndex.from_documents(documents=documents, service_context=service_context, storage_context=storage_context)
index.set_index_id("paul_graham_essay")
index.storage_context.persist("../indices")
return index, service_context