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import json
import gradio as gr
from pdfminer.high_level import extract_pages
from pdfminer.layout import LTTextBoxHorizontal, LTFigure, LTImage
import os
import io
from PIL import Image
import pandas as pd
import tabula
import camelot
from PyPDF2 import PdfReader
def parse_pdf(pdf_file, output_format, progress=gr.Progress()):
"""
Parses a PDF file, extracts text, tables, and images, and formats the output.
Args:
pdf_file: Path to the uploaded PDF file.
output_format: Desired output format ("JSON", "Markdown", or "HTML").
progress: Gradio Progress object for displaying progress.
Returns:
tuple: Extracted text and download data in the specified format.
Returns an empty string and None if there is an error.
"""
try:
with open(pdf_file, 'rb') as file:
pages = list(extract_pages(file)) # Convert generator to list
text = ""
tables = []
images = []
# Iterate through pages and extract text and images
for i, page in enumerate(pages):
progress(i / len(pages)) # Update progress bar
for element in page:
if isinstance(element, LTTextBoxHorizontal):
text += element.get_text()
elif isinstance(element, (LTFigure, LTImage)):
try:
if hasattr(element, 'stream'):
image_data = element.stream.read()
image = Image.open(io.BytesIO(image_data))
image_filename = f"extracted_image_{len(images)}.png"
image.save(image_filename)
images.append({"filename": image_filename})
else:
for child in element:
if isinstance(child, LTImage):
image_data = child.stream.read()
image = Image.open(io.BytesIO(image_data))
image_filename = f"extracted_image_{len(images)}.png"
image.save(image_filename)
images.append({"filename": image_filename})
except Exception as e:
print(f"Error extracting image: {e}")
# Enhanced table extraction (tabula-py preferred, fallback to camelot)
try:
tables = tabula.read_pdf(pdf_file, pages='all', multiple_tables=True)
except Exception as e:
print(f"tabula-py failed: {e}. Trying camelot...")
try:
camelot_tables = camelot.read_pdf(pdf_file)
for table in camelot_tables:
tables.append(table.df)
except Exception as e:
print(f"camelot also failed: {e}. No tables extracted.")
# Format extracted data based on user selection
if output_format == "JSON":
json_data = {
"text": text,
"tables": [table.to_dict() for table in tables],
"images": images
}
download_data = json.dumps(json_data, indent=4) # Add indentation for readability
elif output_format == "Markdown":
markdown_text = f"# Extracted Text\n\n{text}\n\n# Tables\n"
for i, table in enumerate(tables):
markdown_text += f"## Table {i+1}\n"
markdown_text += table.to_markdown(index=False) + "\n\n"
# Image embedding in Markdown (using relative paths)
markdown_text += "\n\n# Images\n\n"
for image in images:
image_path = os.path.join(os.getcwd(), image["filename"])
markdown_text += f'\n'
download_data = markdown_text
elif output_format == "HTML":
html_text = f"<p>{text}</p>\n\n<h2>Tables</h2>\n"
for i, table in enumerate(tables):
html_text += f"<h2>Table {i+1}</h2>\n"
html_text += table.to_html() + "<br>"
# Image embedding in HTML (using relative paths)
html_text += "\n\n<h2>Images</h2>\n\n"
for image in images:
image_path = os.path.join(os.getcwd(), image["filename"])
html_text += f'<img src="{image_path}" alt="Image"><br>\n'
download_data = html_text.encode("utf-8") # Encode for HTML download
return text, download_data
except Exception as main_e:
print(f"A main error occurred: {main_e}")
return "", None # Return empty string and None in case of error
iface = gr.Interface(
fn=parse_pdf,
inputs=["file", gr.Dropdown(["JSON", "Markdown", "HTML"])], # Remove gr.Progress() from inputs
outputs=[
gr.Text(label="Output Text"),
gr.File(label="Download Output")
],
title="PDF Parser",
description="Parse a PDF and choose the output format."
)
if __name__ == "__main__":
iface.launch(share=False) |