Hadoop 3.0.3 docker building when pip install pylint return typed_ast required py3 error

When start to build the docker image with script "start-build-env.sh" inside the source package, progress stop at the command in Dockerfile "pip2 install pylint", and return with following error:

Complete output from command python setup.py egg_info:
Error: typed_ast only runs on Python 3.3 and above.

Typed_ast require pip version 10.0.1, however default installation of python-pip will be

the version 8.1.1