Open in Explorer/Finder folder from customizable popup menu

QuickFolder.py

import c4d
from os import path as p
from c4d import storage as st
from c4d import gui

# Welcome to the world of Python
# Author: Mike Udin, 
# Tutorial here http://mikeudin.net/?p=2930
# 2016

def main():
    ini_file = p.join(p.split(__file__)[0],'ini_file.txt')
    c4d_user_dir = st.GeGetStartupWritePath()
    points = [
        ('Active Doc Folder',doc.GetDocumentPath()),
        ('Preferences',st.GeGetC4DPath(c4d.C4D_PATH_PREFS)),
        ('Desktop',st.GeGetC4DPath(c4d.C4D_PATH_DESKTOP)),
        ('Scripts',p.join(c4d_user_dir,'library','scripts')),
        ('Plugins',p.join(c4d_user_dir,'plugins'))
        ]
    sub_points = []
    if p.exists(ini_file):
        with open(ini_file,'r') as t_file:
            data = t_file.read()
        for line in data.splitlines():
            name,n_dir = line.split(';')
            sub_points.append((name,n_dir))
    
    menu = c4d.BaseContainer()
    for x in points:
        menu.SetString(c4d.FIRST_POPUP_ID+len(menu), x[0])
    menu.SetString(0,'')
    if sub_points:
        sub_menu = c4d.BaseContainer()
        sub_menu.SetString(1, 'Custom Folder')
        subID = c4d.FIRST_POPUP_ID+1000
        for item in sub_points:
            sub_menu.SetString(subID+len(sub_menu), item[0])
    
        menu.SetContainer(c4d.FIRST_POPUP_ID+len(menu)-1, sub_menu)

    menu.SetString(c4d.FIRST_POPUP_ID+len(menu),'Add Custom Folder')
    
    result = gui.ShowPopupDialog(cd=None, bc=menu, x=c4d.MOUSEPOS, y=c4d.MOUSEPOS)-c4d.FIRST_POPUP_ID
    #print result
    if result == c4d.FIRST_POPUP_ID*-1: return
    if result == len(menu)-1:
        c_dir = st.LoadDialog(type=c4d.FILESELECTTYPE_ANYTHING, title="Add New Directory to list", flags=c4d.FILESELECT_DIRECTORY, force_suffix="")
        if c_dir:
            with open(ini_file,'a') as t_file:
                t_file.write(p.split(c_dir)[1]+';'+c_dir+'\n')
        return
    if result > 1000:
        st.ShowInFinder(sub_points[result-1001][1], False)
        return
    
    st.ShowInFinder(points[result][1], False)

if __name__=='__main__':
    main()