pip defining wrong entry point versions on python 2.7

Environment

• pip version: 9.0.3, 10.0.1
• Python version: 2.7.15
• OS: Linux, RHEL Workstation 6.9 (system python == 2.6.6, no python3)

Description On installation on Python 2.7 pip creates console scripts pip, pip2, pip2.7. However pip defines console_scripts pip, pip3, pip3.6 in entry_points.txt

Expected behavior pip should define console_scripts entry points pip, pip2, pip2.7

How to Reproduce

1. Download Python2.7.15.tgz
2. Run configure with --with-ensurepip=install, make, make install
3. In installation directory run

./python -c "import pkg_resources; print(', '.join(
    pkg_resources.get_distribution('pip').get_entry_map()['console_scripts']))"

1. Output is: pip, pip3.6, pip3
2. File lib/python2.7/site-packages/pip-9.0.3.dist-info/entry_points.txt contains:

[console_scripts]
pip = pip:main
pip3 = pip:main
pip3.6 = pip:main

1. ./python -m pip install --upgrade pip
2. Rerun command to list entry points. Output still is pip, pip3.6, pip3
3. File lib/python2.7/site-packages/pip-10.0.1.dist-info/entry_points.txt contains:

[console_scripts]
pip = pip._internal:main
pip3 = pip._internal:main
pip3.6 = pip._internal:main

[Anthchirp]

Yep, I don’t have a stake in this any more.

[hugovk]

Can this be closed now Python 2.7 support is being dropped (https://github.com/pypa/pip/issues/6148)?