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chore: remove old load_text
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docs/document_loader/load_text.md
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## Load text from PDF files
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::: medrag_multi_modal.document_loader.load_text
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medrag_multi_modal/document_loader/load_text.py
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import asyncio
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import os
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from typing import Optional
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import pymupdf4llm
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import PyPDF2
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import rich
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import weave
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from firerequests import FireRequests
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class TextLoader:
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"""
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A class for loading text from a PDF file, processing it into markdown, and optionally publishing it to a Weave dataset.
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This class handles the downloading of a PDF file from a given URL if it does not already exist locally.
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It uses PyPDF2 to read the PDF and pymupdf4llm to convert pages to markdown. The processed pages are stored in a list
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of Page objects, which can be optionally published to a Weave dataset.
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!!! example "Example Usage"
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```python
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import asyncio
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import weave
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from medrag_multi_modal.document_loader import TextLoader
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weave.init(project_name="ml-colabs/medrag-multi-modal")
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url = "https://archive.org/download/GraysAnatomy41E2015PDF/Grays%20Anatomy-41%20E%20%282015%29%20%5BPDF%5D.pdf"
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loader = TextLoader(
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url=url,
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document_name="Gray's Anatomy",
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document_file_path="grays_anatomy.pdf",
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)
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asyncio.run(
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loader.load_data(start_page=9, end_page=15, weave_dataset_name="grays-anatomy-text")
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)
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```
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Args:
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url (str): The URL of the PDF file to download if not present locally.
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document_name (str): The name of the document for metadata purposes.
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document_file_path (str): The local file path where the PDF is stored or will be downloaded.
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"""
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def __init__(self, url: str, document_name: str, document_file_path: str):
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self.url = url
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self.document_name = document_name
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self.document_file_path = document_file_path
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if not os.path.exists(self.document_file_path):
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FireRequests().download(url, filename=self.document_file_path)
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with open(self.document_file_path, "rb") as file:
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pdf_reader = PyPDF2.PdfReader(file)
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self.page_count = len(pdf_reader.pages)
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def get_page_indices(
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self, start_page: Optional[int] = None, end_page: Optional[int] = None
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):
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if start_page:
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if start_page > self.page_count:
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raise ValueError(
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f"Start page {start_page} is greater than the total page count {self.page_count}"
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)
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else:
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start_page = 0
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if end_page:
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if end_page > self.page_count:
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raise ValueError(
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f"End page {end_page} is greater than the total page count {self.page_count}"
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)
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else:
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end_page = self.page_count - 1
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return start_page, end_page
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async def load_data(
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self,
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start_page: Optional[int] = None,
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end_page: Optional[int] = None,
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weave_dataset_name: Optional[str] = None,
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):
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"""
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Asynchronously loads text from a PDF file specified by a URL or local file path,
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processes the text into markdown format, and optionally publishes it to a Weave dataset.
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This function downloads a PDF from a given URL if it does not already exist locally,
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reads the specified range of pages, converts each page's content to markdown, and
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returns a list of Page objects containing the text and metadata. It uses PyPDF2 to read
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the PDF and pymupdf4llm to convert pages to markdown. It processes pages concurrently using
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`asyncio` for efficiency. If a weave_dataset_name is provided, the processed pages are published
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to a Weave dataset.
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Args:
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start_page (Optional[int]): The starting page index (0-based) to process. Defaults to the first page.
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end_page (Optional[int]): The ending page index (0-based) to process. Defaults to the last page.
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weave_dataset_name (Optional[str]): The name of the Weave dataset to publish the pages to, if provided.
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Returns:
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list[Page]: A list of Page objects, each containing the text and metadata for a processed page.
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Raises:
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ValueError: If the specified start_page or end_page is out of bounds of the document's page count.
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"""
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start_page, end_page = self.get_page_indices(start_page, end_page)
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pages = []
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processed_pages_counter: int = 1
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total_pages = end_page - start_page
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async def process_page(page_idx):
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nonlocal processed_pages_counter
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text = pymupdf4llm.to_markdown(
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doc=self.document_file_path, pages=[page_idx], show_progress=False
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)
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pages.append(
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{
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"text": text,
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"page_idx": page_idx,
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"document_name": self.document_name,
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"file_path": self.document_file_path,
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"file_url": self.url,
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}
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)
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rich.print(f"Processed pages {processed_pages_counter}/{total_pages}")
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processed_pages_counter += 1
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tasks = [process_page(page_idx) for page_idx in range(start_page, end_page)]
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for task in asyncio.as_completed(tasks):
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await task
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if weave_dataset_name:
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weave.publish(weave.Dataset(name=weave_dataset_name, rows=pages))
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return pages
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