Questions[menulibre](ubuntu)

This is a virgin install of 20.04, not upgrading from 18.04 and previous versions. I tried to add an item to Other using MenuLibre. Launcher tested OK, saved, etc., yet Whisker menu still not showing "Other" category. If I go back to MenuLibre it does not even show my addition. Yet, in my $HOME all changes and the launcher file is created. I researched the subject, consulted answer here "How to reset MenuLibre"; purged, deleted related files, reinstalled MenuLibre, but nothing helps. This really baffles me.

Further notes a few days later: After various attempts finally I have the "Other" category in Whisker menu with my custom added menu items (launchers). However, I had to do it "under the hood" and not with MenuLibre. Here is how:

1. deleted ~/.config/menus/applications-merged and ~/.config/menus/gnome-applications-merged folders
2. created my launchers (.desktop files) in ~/.local/share/applications/ with Mousepad, according to relevant specs
3. edited ~/.config/menus/xfce-applications.menu XML file with Mousepad in the <Name>Other</Name> section within <layout> part by adding there <Filename>MyOwnLauncher.desktop</Filename> lines of my own Other menu items.

This seems to work. Maybe tedious, but not as frustrating as MenuLibre. I even created a new user to see if MenuLibre would work there - but not really. Same thing, Other is not shown. The new menu item in the other category is in fact created in ~/.config/menus/applications-merged as .desktop files, but invisible to Whisker menu.

Could this be a bug in MenuLibre for the 20.04 xUbuntu version?

I've seen some stuff on here for this, but no solid answers.

I'm running Ubuntu Studio 18.10. I wanted to change the category icon in the Whisker Menu for Wine. I checked the Whisker Menu properties, and the default for editing applications was MenuLibre.

So I installed MenuLibre, changed the icon, and saved it. When I closed MenuLibre and opened the Whisker Menu the new icon was there, but lots of the icons for other programs were now missing. I would like to find a way to get them to show up again.

I can see stuff online of people reporting this issue, but no good solution. Any solutions to this would be welcome, as it gets pretty tiresome having to launch some of my programs from the terminal...

Thanks in advance.

Firstly I have problem with caffeine: Caffeine doesn't work on Ubuntu 17.10

I didn't bind it with python. BTW, running ubuntu under Xorg didn't help.

Secondly, I received strange error when was trying to test python program. I ran

 python3 programname.py test

and receive

File "sampletest.py", line 1, in <module>
    import unittest
  File "/usr/lib/python3.6/unittest/__init__.py", line 59, in <module>
    from .case import (TestCase, FunctionTestCase, SkipTest, skip, skipIf,
  File "/usr/lib/python3.6/unittest/case.py", line 6, in <module>
    import logging
  File "/usr/lib/python3.6/logging/__init__.py", line 28, in <module>
    from string import Template
ImportError: cannot import name 'Template'
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>
    from apport.report import Report
  File "/usr/lib/python3/dist-packages/apport/report.py", line 21, in <module>
    from urllib.request import urlopen
  File "/usr/lib/python3.6/urllib/request.py", line 88, in <module>
    import http.client
  File "/usr/lib/python3.6/http/client.py", line 71, in <module>
    import email.parser
  File "/usr/lib/python3.6/email/parser.py", line 12, in <module>
    from email.feedparser import FeedParser, BytesFeedParser
  File "/usr/lib/python3.6/email/feedparser.py", line 27, in <module>
    from email._policybase import compat32
  File "/usr/lib/python3.6/email/_policybase.py", line 7, in <module>
    from email import header
  File "/usr/lib/python3.6/email/header.py", line 16, in <module>
    import email.quoprimime
  File "/usr/lib/python3.6/email/quoprimime.py", line 44, in <module>
    from string import ascii_letters, digits, hexdigits
ImportError: cannot import name 'ascii_letters'

Then I received error after running alacarte: How can I sort Xfce's whisker menu list alphabetically?

BTW, I receive the similar error when run menulibre:

/usr/lib/python3/dist-packages/menulibre/MenuEditor.py:28: PyGIWarning: GMenu was imported without specifying a version first. Use gi.require_version('GMenu', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import GdkPixbuf, Gio, GLib, GMenu, Gtk
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/menulibre/MenulibreApplication.py", line 1717, in do_activate
    self.win = MenulibreWindow(self)
  File "/usr/lib/python3/dist-packages/menulibre/MenulibreApplication.py", line 207, in __init__
    self.configure_application_treeview(builder)
  File "/usr/lib/python3/dist-packages/menulibre/MenulibreApplication.py", line 462, in configure_application_treeview
    self.treeview = MenulibreTreeview.Treeview(self, builder)
  File "/usr/lib/python3/dist-packages/menulibre/MenulibreTreeview.py", line 43, in __init__
    self._configure_treeview(builder)
  File "/usr/lib/python3/dist-packages/menulibre/MenulibreTreeview.py", line 54, in _configure_treeview
    treestore = MenuEditor.get_treestore()
  File "/usr/lib/python3/dist-packages/menulibre/MenuEditor.py", line 113, in get_treestore
    menu = get_menus()[0]
  File "/usr/lib/python3/dist-packages/menulibre/MenuEditor.py", line 175, in get_menus
    menu = MenuEditor()
  File "/usr/lib/python3/dist-packages/menulibre/MenuEditor.py", line 227, in __init__
    self.load()
  File "/usr/lib/python3/dist-packages/menulibre/MenuEditor.py", line 245, in load
    if not self.tree.load_sync():
GLib.Error: g-markup-error-quark: Error on line 1 char 1: Document was empty or contained only whitespace (1)

I'm sure problem in my python interpreter, but I don't know what it can be. Please, help

P.S. I'm new in linux. So, please, explain as simple as possible

P.P.S. I have Ubuntu 17.10