Get python version in shell

python-version.sh

#!/bin/sh

get_python_version() {
    version_str=$(python -V 2>&1)
    temp=${version_str##* }
    python_version_major=${temp%%.*}
    temp=${temp#*.}
    python_version_minor=${temp%%.*}
}

get_python_version

echo "Python version: ${python_version_major}.${python_version_minor}"