Find full path of the Python interpreter?

sys.executable contains full path of the currently running Python interpreter.

import sys

print(sys.executable)

which is now documented here

Just noting a different way of questionable usefulness, using os.environ:

import os
python_executable_path = os.environ['_']

e.g.

$ python -c "import os; print(os.environ['_'])"
/usr/bin/python