File Read Error using Gradio & langchain.document_loaders <RESOLVED>

Beginners
1

I am trying to read the pdf using langchain.document_loaders and it’s PyPDFLoader class. But getting this error:

Error

[Errno 2] Cannot read an empty file

This is my code:

from langchain.document_loaders import PyPDFLoader
def pdf_parser(uploaded_file):
    bytes_data = uploaded_file.read()
    with NamedTemporaryFile(delete=False) as tmp:  # open a named temporary file
        tmp.write(bytes_data)                      # Write data from the uploaded file into it
        pdf_loader = PyPDFLoader(tmp.name)        # <---- now it works!

        #pdf_loader = PyPDFLoader(file_path) only for file path offline
    
        documents = pdf_loader.load()

def predict(file):
    resource = pdf_parser(file)

    qa_notes = qa_generator(resource)

    return qa_notes

iface = gr.Interface(
    fn=predict,
    inputs=[
        gr.inputs.File(),
    ],
    outputs="text",
    description=description,
    title=title,
    allow_screenshot=True,
)

iface.launch(enable_queue=True, show_error=True)