SOLVED Debian Wheezy Letsencrypt error /opt/eff.org/certbot/venv/bin/python: No module named pip.__main__; ‘pip’ is a package and cannot be directly executed

My case and solution:

Debian 7.11 wheezy
python2.7
python-pip NOT installed

My steps:

#ln -fs /usr/lib/python2.7/plat-x86_64-linux-gnu/_sysconfigdata_nd.py /usr/lib/python2.7/
#wget https://raw.githubusercontent.com/certbot/certbot/75499277be6699fd5a9b884837546391950a3ec9/certbot-auto
#chmod +x ./certbot-auto
#certbot-auto renew --no-self-upgrade

it download some files and works fine.

Src: https://github.com/certbot/certbot/issues/6824