import streamlit as st
import os 

uploaded_file = st.sidebar.file_uploader("Choose a file")
if uploaded_file is not None:
  filename = uploaded_file.name
  with open(filename, "wb") as f:
    f.write(uploaded_file.getbuffer())
  st.write(os.listdir("./"))
  st.write(os.listdir("/"))
  st.write(os.listdir("/home"))
  st.write(os.listdir("/media"))