#!/bin/sh
#
# LLVM requires 2.7 <= python2 < 3
#

valid_python() {
    $1 -c 'import sys; sys.exit(not (sys.version_info >= (2,7) and sys.version_info < (3,0)))' 2> /dev/null
}

for python in python python2 python2.7 python27; do
    if valid_python $python; then
        echo `which $python`
        break
    fi
done