pip installation failure

pip_install.log

sudo pip install packaging
Traceback (most recent call last):
  File "/usr/local/bin/pip", line 7, in <module>
    from pip._internal.cli.main import main
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/main.py", line 9, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/autocompletion.py", line 10, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/main_parser.py", line 8, in <module>
    from pip._internal.cli import cmdoptions
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/cli/cmdoptions.py", line 30, in <module>
    from pip._internal.utils.hashes import STRONG_HASHES
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/utils/hashes.py", line 2, in <module>
    from typing import TYPE_CHECKING, BinaryIO, Dict, Iterator, List, NoReturn
ImportError: cannot import name 'NoReturn'

Exited with code exit status 1