ECS Community 3.5

We try to install ECSCommuntiy, on first step we have this error:

island-step1
ecs-install> Initializing data container, one moment ..DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality.
ERROR: Command errored out with exit status 1:
command: /usr/bin/python2 /usr/lib/python2.7/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-pd3hLQ/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- 'setuptools>=40.6.0' wheel 'cffi>=1.12; platform_python_implementation != '"'"'PyPy'"'"''
cwd: None
Complete output (67 lines):
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality.
Collecting setuptools>=40.6.0
Using cached setuptools-44.1.1-py2.py3-none-any.whl (583 kB)
Collecting wheel
Using cached wheel-0.36.2-py2.py3-none-any.whl (35 kB)
Collecting cffi>=1.12
Downloading cffi-1.14.5.tar.gz (475 kB)
Collecting pycparser
Downloading pycparser-2.20-py2.py3-none-any.whl (112 kB)
Using legacy 'setup.py install' for cffi, since package 'wheel' is not installed.
Installing collected packages: setuptools, wheel, pycparser, cffi
Running setup.py install for cffi: started
Running setup.py install for cffi: finished with status 'error'
ERROR: Command errored out with exit status 1:

So python 2.7 is deprecated, what is the solution.

any idea ?