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Hi!

I have updated Adrien’s code to make it work with recursive subdirectories.

import os
import streamlit as st


def st_file_selector(st_placeholder, path='.', label='Please, select a file/folder...'):
    # get base path (directory)
    base_path = '.' if path is None or path is '' else path
    base_path = base_path if os.path.isdir(
        base_path) else os.path.dirname(base_path)
    base_path = '.' if base_path is None or base_path is '' else base_path
    # list files in base path directory
    files = os.listdir(base_path)
    if base_path is not '.':
        files.insert(0, '..')
    files.insert(0, '.')
    selected_file = st_placeholder.selectbox(
        label=label, options=files, key=base_path)
    selected_path = os.path.normpath(os.path.join(base_path, selected_file))
    if selected_file is '.':
        return selected_path
    if os.path.isdir(selected_path):
        selected_path = st_file_selector(st_placeholder=st_placeholder,
                                         path=selected_path, label=label)
    return selected_path

It uses the following code to handle the persistence of session states:

The st_file_selector function can be invoked in the following way:

    st_session_state = get(input_path='.')
    st_session_state.input_path = st_file_selector(st_placeholder=st.empty(), path=st_session_state.input_path, label=f'Input path')
    st.text(f'> Selected \'{st_session_state.input_path}\'.')

Hope it helps.

Cheers,
Mark

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