Source and binary executables are signed by the release manager using their OpenPGP key. The release managers and binary builders since Python 2.3 have been: Note: Barry’s key id A74B06BF is used to sign the Python 2.6.8 and 2.6.9 releases. His key id EA5BBD71 was used to sign all other Python 2.
pocket source: https://www.python.org/downloads/