Traceback error on VS code

[shivam01anand]

Traceback (most recent call last): File "/usr/lib/python2.7/runpy.py", line 163, in _run_module_as_main mod_name, _Error) File "/usr/lib/python2.7/runpy.py", line 111, in _get_module_details import(mod_name) # Do not catch exceptions initializing package File "jupytext/init.py", line 3, in from .formats import NOTEBOOK_EXTENSIONS, get_format_implementation, guess_format File "jupytext/formats.py", line 10, in import nbformat File "nbformat/init.py", line 10, in from traitlets.log import get_logger File "traitlets/init.py", line 3, in from . import traitlets File "traitlets/traitlets.py", line 1014 class HasDescriptors(metaclass=MetaHasDescriptors): ^ SyntaxError: invalid syntax

0. Installed via ext install
1. code-insiders --enable-proposed-api=donjayamanne.vscode-jupytext
2. couldn't see option to convert, after right clicking on py/ipynb file
3. tried to install both jupytext libraries via marketplace.
4. getting the above error.

FYR:
Ubuntu 18
Python version 3.6.9

Thanks for developing the library, TIA