runtime error

(most recent call last): File "/home/user/app/bot.py", line 21, in <module> print(retriever.get_relevant_documents(query)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/langchain/schema/retriever.py", line 211, in get_relevant_documents raise e File "/usr/local/lib/python3.11/site-packages/langchain/schema/retriever.py", line 204, in get_relevant_documents result = self._get_relevant_documents( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/langchain/schema/vectorstore.py", line 585, in _get_relevant_documents docs = self.vectorstore.similarity_search(query, **self.search_kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/langchain/vectorstores/chroma.py", line 261, in similarity_search docs_and_scores = self.similarity_search_with_score(query, k, filter=filter) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/langchain/vectorstores/chroma.py", line 345, in similarity_search_with_score query_embedding = self._embedding_function.embed_query(query) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/langchain/embeddings/openai.py", line 518, in embed_query return self.embed_documents([text])[0] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/langchain/embeddings/openai.py", line 490, in embed_documents return self._get_len_safe_embeddings(texts, engine=self.deployment) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/langchain/embeddings/openai.py", line 331, in _get_len_safe_embeddings raise ImportError( ImportError: Could not import tiktoken python package. This is needed in order to for OpenAIEmbeddings. Please install it with `pip install tiktoken`.

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