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80 lines
3.0 KiB
Python
80 lines
3.0 KiB
Python
import re
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from math import ceil
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from typing import List
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import tiktoken
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from application.parser.schema.base import Document
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def separate_header_and_body(text):
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header_pattern = r"^(.*?\n){3}"
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match = re.match(header_pattern, text)
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header = match.group(0)
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body = text[len(header):]
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return header, body
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def group_documents(documents: List[Document], min_tokens: int, max_tokens: int) -> List[Document]:
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docs = []
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current_group = None
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for doc in documents:
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doc_len = len(tiktoken.get_encoding("cl100k_base").encode(doc.text))
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# Check if current group is empty or if the document can be added based on token count and matching metadata
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if (current_group is None or
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(len(tiktoken.get_encoding("cl100k_base").encode(current_group.text)) + doc_len < max_tokens and
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doc_len < min_tokens and
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current_group.extra_info == doc.extra_info)):
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if current_group is None:
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current_group = doc # Use the document directly to retain its metadata
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else:
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current_group.text += " " + doc.text # Append text to the current group
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else:
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docs.append(current_group)
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current_group = doc # Start a new group with the current document
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if current_group is not None:
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docs.append(current_group)
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return docs
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def split_documents(documents: List[Document], max_tokens: int) -> List[Document]:
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docs = []
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for doc in documents:
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token_length = len(tiktoken.get_encoding("cl100k_base").encode(doc.text))
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if token_length <= max_tokens:
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docs.append(doc)
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else:
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header, body = separate_header_and_body(doc.text)
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if len(tiktoken.get_encoding("cl100k_base").encode(header)) > max_tokens:
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body = doc.text
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header = ""
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num_body_parts = ceil(token_length / max_tokens)
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part_length = ceil(len(body) / num_body_parts)
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body_parts = [body[i:i + part_length] for i in range(0, len(body), part_length)]
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for i, body_part in enumerate(body_parts):
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new_doc = Document(text=header + body_part.strip(),
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doc_id=f"{doc.doc_id}-{i}",
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embedding=doc.embedding,
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extra_info=doc.extra_info)
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docs.append(new_doc)
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return docs
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def group_split(documents: List[Document], max_tokens: int = 2000, min_tokens: int = 150, token_check: bool = True):
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if not token_check:
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return documents
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print("Grouping small documents")
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try:
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documents = group_documents(documents=documents, min_tokens=min_tokens, max_tokens=max_tokens)
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except Exception:
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print("Grouping failed, try running without token_check")
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print("Separating large documents")
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try:
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documents = split_documents(documents=documents, max_tokens=max_tokens)
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except Exception:
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print("Grouping failed, try running without token_check")
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return documents
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