Importerror: no module named typing error reporting solution (python2 PIP needs to be backed back from 21)

The default installation of PIP for python2 is version 21. This version is no longer supported, so an error is reported when executing pip. You need to back up the PIP version and execute the following command

curl -O https://bootstrap.pypa.io/pip/2.7/get-pip.py
python get-pip.py
python -m pip install --upgrade "pip < 21.0"

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