Duplicate from Tuana/PDF-Summarizer

Co-authored-by: Tuana Celik <Tuana@users.noreply.huggingface.co>

.gitattributes

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README.md

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+---
+title: PDF Summarizer
+emoji: 🌅
+colorFrom: green
+colorTo: pink
+sdk: streamlit
+sdk_version: 1.9.0
+app_file: app.py
+pinned: false
+duplicated_from: Tuana/PDF-Summarizer
+---
+
+Check out the configuration reference at https://huggingface.co/docs/hub/spaces#reference

app.py

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+import streamlit as st
+from haystack.document_stores import InMemoryDocumentStore
+from haystack.nodes import TransformersSummarizer, PreProcessor, PDFToTextConverter, Crawler
+from haystack.schema import Document
+import logging
+import base64
+from PIL import Image
+import validators
+
+@st.cache(hash_funcs={"builtins.SwigPyObject": lambda _: None},allow_output_mutation=True)
+def start_haystack():
+    document_store = InMemoryDocumentStore()
+    preprocessor = PreProcessor(
+        clean_empty_lines=True,
+        clean_whitespace=True,
+        clean_header_footer=True,
+        split_by="word",
+        split_length=200,
+        split_respect_sentence_boundary=True,
+    )
+    summarizer = TransformersSummarizer(model_name_or_path="facebook/bart-large-cnn")
+    return document_store, summarizer, preprocessor
+
+
+def pdf_to_document_store(pdf_file):
+    document_store.delete_documents()
+    converter = PDFToTextConverter(remove_numeric_tables=True, valid_languages=["en"])
+    with open("temp-path.pdf", 'wb') as temp_file:
+        base64_pdf = base64.b64encode(pdf_file.read()).decode('utf-8')
+        temp_file.write(base64.b64decode(base64_pdf))
+        doc = converter.convert(file_path="temp-path.pdf", meta=None)
+        preprocessed_docs=preprocessor.process(doc)
+        document_store.write_documents(preprocessed_docs)
+        temp_file.close()
+    
+def summarize(content):
+    pdf_to_document_store(content)
+    summaries = summarizer.predict(documents=document_store.get_all_documents(), generate_single_summary=True)
+    return summaries
+
+def set_state_if_absent(key, value):
+    if key not in st.session_state:
+        st.session_state[key] = value
+        
+set_state_if_absent("summaries", None)
+        
+document_store, summarizer, preprocessor = start_haystack()
+
+st.title('TL;DR with Haystack')
+image = Image.open('header-image.png')
+st.image(image)
+
+st.markdown( """
+This Summarization demo uses a [Haystack TransformerSummarizer node](https://haystack.deepset.ai/pipeline_nodes/summarizer). You can upload a PDF file, which will be converted to text with the [Haystack PDFtoTextConverter](https://haystack.deepset.ai/reference/file-converters#pdftotextconverter). In this demo, we produce 1 summary for the whole file you upload. So, the TransformerSummarizer treats the whole thing as one string, which means along with the model limitations, PDFs that have a lot of unneeded text at the beginning produce poor results. For best results, upload a document that has minimal intro and tables at the top. 
+""", unsafe_allow_html=True)
+
+uploaded_file = st.file_uploader("Choose a PDF file", accept_multiple_files=False)
+                
+if uploaded_file is not None :
+    if st.button('Summarize Document'):
+        with st.spinner("📚    Please wait while we produce a summary..."):
+            try:
+                st.session_state.summaries = summarize(uploaded_file)
+            except Exception as e:
+                logging.exception(e)
+ 
+if st.session_state.summaries:
+    st.write('## Summary')
+    for count, summary in enumerate(st.session_state.summaries):
+        st.write(summary.content)

packages.txt

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+poppler-utils
+xpdf

requirements.txt

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+farm-haystack[ocr,crawler]==1.4.0