app.py

import streamlit as st
import pandas as pd

# Load dataframe
file = st.file_uploader('Seleccione un archivo: ')
df = file

# Sidebar option
option = st.sidebar.selectbox('Classify results by:', ('Question', 'Category'))

# Group dataframe by chosen option
if option == 'Question':
    grouped_df = df.groupby('Question')
elif option == 'Category':
    grouped_df = df.groupby('Category')

# Generate text with bullets
text = ''
for name, group in grouped_df:
    text += f'{name}:\n\n'
    for index, row in group.iterrows():
        text += f'- {row["Item"]}\n'
    text += '\n'

# Download link for text file
st.markdown(f'<a href="data:text/plain;charset=utf-8,{text}" download="result.txt">Download Text File</a>', unsafe_allow_html=True)