Update utils.py

utils.py

@@ -9,7 +9,7 @@ from   langchain.prompts           import PromptTemplate
 from   langchain.schema            import StrOutputParser
 from   langchain.utils             import get_from_dict_or_env
 from   langchain.vectorstores      import Chroma
-from   langchain.text_splitter     import RecursiveCharacterTextSplitter
+from   langchain.text_splitter     import RecursiveCharacterTextSplitter, CharacterTextSplitter
 from   langchain.chains            import RetrievalQA, MapReduceDocumentsChain, ReduceDocumentsChain
 from   langchain.document_loaders  import TextLoader
 from   langchain.embeddings        import HuggingFaceEmbeddings, OpenAIEmbeddings