pyenv/pyenv.d/install/latest.bash

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DEFINITION_PREFIX="${DEFINITION%%:*}"
DEFINITION_TYPE="${DEFINITION_PREFIX%%-*}" # TODO: support non-CPython versions
if [[ "${DEFINITION}" != "${DEFINITION_PREFIX}" ]]; then
DEFINITION_CANDIDATES=\
($(python-build --definitions | \
grep -F "${DEFINITION_PREFIX}" | \
grep "^${DEFINITION_TYPE}" | \
sed -E -e '/-dev$/d' -e '/-src$/d' -e '/(b|rc)[0-9]+$/d' | \
sort -t. -k1,1r -k 2,2nr -k 3,3nr \
|| true))
DEFINITION="${DEFINITION_CANDIDATES}"
VERSION_NAME="${DEFINITION##*/}"
fi