Fix Dockerfile build issue

autorag/data/chunk/langchain_chunk.py

@@ -0,0 +1,76 @@
+import os
+from itertools import chain
+import uuid
+from typing import Tuple, List, Dict, Any, Optional
+
+from langchain_text_splitters import TextSplitter
+
+from autorag.data.chunk.base import chunker_node, add_file_name
+from autorag.data.utils.util import add_essential_metadata, get_start_end_idx
+
+
+@chunker_node
+def langchain_chunk(
+	texts: List[str],
+	chunker: TextSplitter,
+	file_name_language: Optional[str] = None,
+	metadata_list: Optional[List[Dict[str, str]]] = None,
+) -> Tuple[
+	List[str], List[str], List[str], List[Tuple[int, int]], List[Dict[str, Any]]
+]:
+	"""
+	Chunk texts from the parsed result to use langchain chunk method
+
+	:param texts: The list of texts to chunk from the parsed result
+	:param chunker: A langchain TextSplitter(Chunker) instance.
+	:param file_name_language: The language to use 'add_file_name' feature.
+	    You need to set one of 'English' and 'Korean'
+	    The 'add_file_name' feature is to add a file_name to chunked_contents.
+	    This is used to prevent hallucination by retrieving contents from the wrong document.
+	    Default form of 'English' is "file_name: {file_name}\n contents: {content}"
+	:param metadata_list: The list of dict of metadata from the parsed result
+	:return: tuple of lists containing the chunked doc_id, contents, path, start_idx, end_idx and metadata
+	"""
+	results = [
+		langchain_chunk_pure(text, chunker, file_name_language, meta)
+		for text, meta in zip(texts, metadata_list)
+	]
+
+	doc_id, contents, path, start_end_idx, metadata = (
+		list(chain.from_iterable(item)) for item in zip(*results)
+	)
+
+	return doc_id, contents, path, start_end_idx, metadata
+
+
+def langchain_chunk_pure(
+	text: str,
+	chunker: TextSplitter,
+	file_name_language: Optional[str] = None,
+	_metadata: Optional[Dict[str, str]] = None,
+):
+	# chunk
+	chunk_results = chunker.create_documents([text], metadatas=[_metadata])
+
+	# make doc_id
+	doc_id = list(str(uuid.uuid4()) for _ in range(len(chunk_results)))
+
+	# make path
+	path_lst = list(map(lambda x: x.metadata.get("path", ""), chunk_results))
+
+	# make contents and start_end_idx
+	if file_name_language:
+		chunked_file_names = list(map(lambda x: os.path.basename(x), path_lst))
+		chunked_texts = list(map(lambda x: x.page_content, chunk_results))
+		start_end_idx = list(map(lambda x: get_start_end_idx(text, x), chunked_texts))
+		contents = add_file_name(file_name_language, chunked_file_names, chunked_texts)
+	else:
+		contents = list(map(lambda node: node.page_content, chunk_results))
+		start_end_idx = list(map(lambda x: get_start_end_idx(text, x), contents))
+
+	# make metadata
+	metadata = list(
+		map(lambda node: add_essential_metadata(node.metadata), chunk_results)
+	)
+
+	return doc_id, contents, path_lst, start_end_idx, metadata