ImportError: cannot import name 'string_types' from 'panel.util'

[MarcSkovMadsen]

When testing on panel 0.13.0rc5 I get

2022-04-07 21:06:14,769 Error running application handler <bokeh.application.handlers.script.ScriptHandler object at 0x0000029BC5655100>: cannot import name 'string_types' from 'panel.util' (c:\repos\private\awesome-panel\.venv\lib\site-packages\panel\util.py)
File 'ngl_viewer.py', line 15, in <module>:
from panel.util import lazy_load, string_types Traceback (most recent call last):
  File "c:\repos\private\awesome-panel\.venv\lib\site-packages\bokeh\application\handlers\code_runner.py", line 231, in run
    exec(self._code, module.__dict__)
  File "C:\repos\private\awesome-panel\awesome_panel\apps\py3dmol.py", line 4, in <module>
    from panel_chemistry.pane import Py3DMol
  File "c:\repos\private\awesome-panel\.venv\lib\site-packages\panel_chemistry\pane\__init__.py", line 6, in <module>
    from .ngl_viewer import NGLViewer
  File "c:\repos\private\awesome-panel\.venv\lib\site-packages\panel_chemistry\pane\ngl_viewer.py", line 15, in <module>
    from panel.util import lazy_load, string_types
ImportError: cannot import name 'string_types' from 'panel.util' (c:\repos\private\awesome-panel\.venv\lib\site-packages\panel\util.py)

[tubiana]

Hi :-)

First of all thank you so much for your great pluggin =D I wanted to use it with Panel 0.13 (because of the great new notification system) and I also face this bug. While digging arround I realise it could be fixed by changing in ngl_viewer.py

from panel.util import lazy_load, string_types

by

from panel.util import lazy_load
from six import string_types

I made the changes and create a pull request --> #24 :-)

Best regards, Thibault.