Recursive directory scan for first file index.hmtl (python 3) + sublime text plugin

open_docs3.py

"""
Open documentation files contained in directory.
"""
import os
import webbrowser

index_found = False


def enter_node(current_dir, index_html_files):
    """
    Recursively retrieves the first file called 'index.html' in subdirectories 
    of current_dir.
    :param current_dir: a directory to scan for 'index.html' files.
    :type current_dir: str
    :param index_html_files: list of 'index.html' files found so far (full path)
    :type index_html_files: list
    :return: list of string
    :rtype: list
    """
    listed_files = os.listdir(current_dir)
    sub_dirs = []
    sub_files = []
    print(current_dir)
    for file_from_list in listed_files:
        if os.path.isdir(
                os.path.join(
                    os.path.abspath(current_dir), file_from_list
                )
        ):
            sub_dirs.append(file_from_list)
        else:
            sub_files.append(file_from_list)
    if 'index.html' in sub_files:
        index_html_files.append(
            os.path.abspath(
                os.path.join(
                    current_dir,
                    'index.html')))
        print(index_html_files[-1])
        print('index.html found! Returning...')
    if len(sub_dirs) == 0 or 'index.html' in sub_files:
        pass
        # exit_dir = True
    else:
        # Only continue recursion if files below and index.html not found
        # exit_dir = False
        for new_dir in sub_dirs:
            enter_node(os.path.join(
                current_dir, new_dir), index_html_files
            )
            # exit_dir = True
    return index_html_files

index_html_files_found = enter_node(os.getcwd(), [])

for file_from_final_list in index_html_files_found:
    webbrowser.open(file_from_final_list)

open_docs_subl_plugin.py

import sublime
import sublime_plugin
import os
import sys
import webbrowser
import threading

libdocs_folder = 'C:\\Users\\ssv\\Documents\\LIBDOCS'

sys.path.append(libdocs_folder)

class OpendocsCommand(sublime_plugin.TextCommand):

    def run(self, edit, filename=None):
        th = OpendocsThread(filename)
        th.start()

class OpendocsThread(threading.Thread):

    def __init__(self, filename=None):
        threading.Thread.__init__(self)

    def run(self):
        import opendocs_3
        index_html_files_found = opendocs_3.enter_node(libdocs_folder, [])
        for file_from_final_list in index_html_files_found:
            webbrowser.open(file_from_final_list)