+
+################################################################################
+#
+# NAME
+# lf-pyver [python-version X.Y]
+#
+# SYNOPSIS
+# pyver 3.8 (outputs 3.8.13)
+# or
+# pyver 3.10 (outputs 3.10.6)
+# or
+# pyver 3 (outputs the most recent version 3.10.6)
+#
+# DESCRIPTION
+# The function takes short python version in the format and X.Y and prints
+# the semver format (X.Y.Z) of the version that has been installed on the system
+# with pyenv.
+#
+# When the expected version is not installed, nothing is returned.
+#
+# RETURN VALUES
+# OK: 0
+# Fail: 1
+#
+################################################################################
+
+lf-pyver() {
+ local py_version_xy="${1:-python3}"
+ local py_version_xyz=""
+
+ pyenv versions | sed 's/^[ *]* //' | awk '{ print $1 }' | grep -E '^[0-9.]*[0-9]$' \
+ > "/tmp/.pyenv_versions"
+ if [[ ! -s "/tmp/.pyenv_versions" ]]; then
+ lf-echo-stderr "${FUNCNAME[0]}(): ERROR: pyenv not available"
+ return 1
+ fi
+
+ # strip out any prefix for (ex: 'python3.8' or 'v3.8') and match regex
+ # to the output return by pyenv
+ py_version_xyz=$(grep "^${py_version_xy//[a-zA-Z]/}" "/tmp/.pyenv_versions" |
+ sort -V | tail -n 1;)
+ if [[ -z ${py_version_xyz} ]]; then
+ lf-echo-stderr "${FUNCNAME[0]}(): ERROR: Not installed on host: ${py_version_xy}"
+ return 1
+ fi
+ echo "${py_version_xyz}"
+ return 0
+}