converting to bytes like object

app.py

@@ -3,6 +3,8 @@ from haystack.document_stores import InMemoryDocumentStore
 from haystack.nodes import TransformersSummarizer, PreProcessor, PDFToTextConverter, TfidfRetriever
 from haystack.schema import Document
 import logging
+import base64
+
 
 @st.cache(hash_funcs={"builtins.SwigPyObject": lambda _: None},allow_output_mutation=True)
 def start_haystack():
@@ -24,10 +26,12 @@ def pdf_to_document_store(pdf_files):
     documents = []
     for pdf in pdf_files:
         with open("temp-path.pdf", 'wb') as temp_file:
-            temp_file.write(pdf)
+            base64_pdf = base64.b64encode(pdf.read()).decode('utf-8')
+            temp_file.write(base64.b64decode(base64_pdf))
             doc = converter.convert(file_path="temp-path.pdf", meta=None)[0]
             preprocessed_doc=preprocessor.process([doc])
             documents.append(preprocessed_doc)
+        temp_file.close()
     document_store.write_documents(documents)
     st.write('Document count: ', document_store.get_document_count())