Download button data parameter issues

Using Streamlit
2

Create a button to generate report, once the report is generated create a download button.

import streamlit as st


def generate_report(repfn):
    with open(repfn, 'w') as f:
        f.write('Report')
    st.write('done report generation')


if st.button('generate report'):
    repfn = 'report.pdf'
    generate_report(repfn)

    with open(repfn, "rb") as f:
        st.download_button(
            label="Download report",
            data=f,
            file_name=repfn)