message: [Shell] Simplify Extracting Python Version
  Instead of parsing the Python version with a fairly convoluted regex,
  just print the major and minor version and call it a day.
diff: @@ -56,8 +56,7 @@ fi
  OS_NAME=`uname -s`
  PYTHON=${PYTHON_EXECUTABLE:-/usr/bin/env python}
  -PYTHON_VERSION=`${PYTHON} --version 2>&1 | sed -e 's,Python ,,' -e 's,[.][0-9],,2' -e 's,[a-z][a-z][0-9],,'`
  -
  +PYTHON_VERSION=`${PYTHON} -c 'import sys; print("{}.{}".format(sys.version_info.major, sys.version_info.minor))'`
  if [ $Debug -eq 1 ]
  then
  