README example gives errors on .pdf files

[gzerveas]

After pip install megaparse in a clean environment, I've tried the README example on a couple of .pdf files and a .xlsx, .doc file. Although I guess the unstructured_parser is expected to fail on everything but .pdf files, in all cases I get the following error message:

{
	"name": "ImportError",
	"message": "libGL.so.1: cannot open shared object file: No such file or directory",
	"stack": "---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
Cell In[24], line 1
----> 1 from megaparse import MegaParse
      2 from langchain_openai import ChatOpenAI
      3 from megaparse.parser.unstructured_parser import UnstructuredParser

File ~/miniconda3/envs/megaflex/lib/python3.10/site-packages/megaparse/__init__.py:1
----> 1 from .Converter import MegaParse
      3 __all__ = [\"MegaParse\"]

File ~/miniconda3/envs/megaflex/lib/python3.10/site-packages/megaparse/Converter.py:25
     23 from megaparse.markdown_processor import MarkdownProcessor
     24 from megaparse.multimodal_convertor.megaparse_vision import MegaParseVision
---> 25 from megaparse.unstructured_convertor import ModelEnum, UnstructuredParser
     28 class Converter:
     29     def __init__(self) -> None:

File ~/miniconda3/envs/megaflex/lib/python3.10/site-packages/megaparse/unstructured_convertor.py:4
      2 import re
      3 from langchain_openai import ChatOpenAI
----> 4 from unstructured.partition.pdf import partition_pdf
      5 from dotenv import load_dotenv
      6 from langchain_core.prompts import ChatPromptTemplate

File ~/miniconda3/envs/megaflex/lib/python3.10/site-packages/unstructured/partition/pdf.py:20
     18 from PIL import Image as PILImage
     19 from pypdf import PdfReader
---> 20 from unstructured_inference.inference.layout import DocumentLayout
     21 from unstructured_inference.inference.layoutelement import LayoutElement
     23 from unstructured.chunking import add_chunking_strategy

File ~/miniconda3/envs/megaflex/lib/python3.10/site-packages/unstructured_inference/inference/layout.py:15
     10 from PIL import Image, ImageSequence
     12 from unstructured_inference.inference.elements import (
     13     TextRegion,
     14 )
---> 15 from unstructured_inference.inference.layoutelement import LayoutElement, LayoutElements
     16 from unstructured_inference.logger import logger
     17 from unstructured_inference.models.base import get_model

File ~/miniconda3/envs/megaflex/lib/python3.10/site-packages/unstructured_inference/inference/layoutelement.py:7
      4 from typing import Any, Collection, Iterable, List, Optional
      6 import numpy as np
----> 7 from layoutparser.elements.layout import TextBlock
      8 from pandas import DataFrame
      9 from scipy.sparse.csgraph import connected_components

File ~/miniconda3/envs/megaflex/lib/python3.10/site-packages/layoutparser/elements/__init__.py:16
      1 # Copyright 2021 The Layout Parser team. All rights reserved.
      2 #
      3 # Licensed under the Apache License, Version 2.0 (the \"License\");
   (...)
     12 # See the License for the specific language governing permissions and
     13 # limitations under the License.
     15 from .base import BaseCoordElement, BaseLayoutElement
---> 16 from .layout_elements import (
     17     Interval,
     18     Rectangle,
     19     Quadrilateral,
     20     TextBlock,
     21     ALL_BASECOORD_ELEMENTS,
     22     BASECOORD_ELEMENT_NAMEMAP,
     23     BASECOORD_ELEMENT_INDEXMAP,
     24 )
     25 from .layout import Layout

File ~/miniconda3/envs/megaflex/lib/python3.10/site-packages/layoutparser/elements/layout_elements.py:25
     23 import pandas as pd
     24 from PIL import Image
---> 25 from cv2 import getPerspectiveTransform as _getPerspectiveTransform
     26 from cv2 import warpPerspective as _warpPerspective
     28 from .base import BaseCoordElement, BaseLayoutElement

ImportError: libGL.so.1: cannot open shared object file: No such file or directory"
}