Python 2.7.18 is the last release of Python 2.
As of January 1st, 2020 no new bug reports, fixes, or changes will be made to Python 2, and Python 2 is no longer supported.
Python 3, is not backward compatible. python.org suggest running 2to3 tool to automatically convert Python 2 to Python 3.
Here is an example:
The ConfigParser module has been renamed to configparser in Python 3. The 2to3 tool will automatically adapt imports when converting your sources to Python 3.
ref: https://docs.python.org/2/library/configparser.html
