little script

#!/bin/bash
if [ -z "$PYTHON_EXE" ]; then
  PYTHON_EXE='/usr/bin/python'
  if [ -f "/usr/bin/python2.7" ]; then
    PYTHON_EXE='/usr/bin/python2.7'
  elif [ -f "/usr/bin/python2.6" ]; then
    PYTHON_EXE='/usr/bin/python2.6'
  elif [ -f "/usr/bin/python2.5" ]; then
    PYTHON_EXE='/usr/bin/python2.5'
  elif [ -f "/usr/bin/python2" ]; then
    PYTHON_EXE='/usr/bin/python2'
  fi
fi
$PYTHON_EXE ./bin/install.py $@