regex: drop Python 3.9 support.

Only on-tree user (calibre) targets 3.10 only already.

dev-python/regex/regex-2020.1.8.recipe

@@ -4,7 +4,7 @@ standard ‘re’ module, but offers additional functionality."
 HOMEPAGE="https://pypi.org/project/regex/"
 COPYRIGHT="2013-2020 Matthew Barnett"
 LICENSE="MIT"
-REVISION="6"
+REVISION="7"
 SOURCE_URI="https://pypi.org/packages/source/r/regex/regex-$portVersion.tar.gz"
 CHECKSUM_SHA256="d0f424328f9822b0323b3b6f2e4b9c90960b24743d220763c7f07071e0778351"
 
@@ -26,13 +26,12 @@ BUILD_PREREQUIRES="
 	cmd:gcc$secondaryArchSuffix
 	"
 
-PYTHON_PACKAGES=(python39 python310)
-PYTHON_VERSIONS=(3.9 3.10)
-for i in "${!PYTHON_PACKAGES[@]}"; do
-	pythonPackage=${PYTHON_PACKAGES[i]}
-	pythonVersion=${PYTHON_VERSIONS[$i]}
+PYTHON_VERSIONS=(3.10)
 
-	eval "PROVIDES_${pythonPackage}=\"
+for pythonVersion in ${PYTHON_VERSIONS[@]}; do
+	pythonPackage=python${pythonVersion//.}
+
+	eval "PROVIDES_$pythonPackage=\"
 		${portName}_$pythonPackage = $portVersion
 		\""
 	if [ "$targetArchitecture" = x86_gcc2 ]; then
@@ -54,19 +53,20 @@ done
 
 INSTALL()
 {
-	for i in "${!PYTHON_PACKAGES[@]}"; do
-		pythonPackage=${PYTHON_PACKAGES[i]}
-		pythonVersion=${PYTHON_VERSIONS[$i]}
+	for pythonVersion in ${PYTHON_VERSIONS[@]}; do
+		pythonPackage=python${pythonVersion//.}
 
 		python=python$pythonVersion
 		installLocation=$prefix/lib/$python/vendor-packages/
 		export PYTHONPATH=$installLocation:$PYTHONPATH
+
 		mkdir -p $installLocation
 		rm -rf build
+
 		$python setup.py build install \
 			--root=/ --prefix=$prefix
 
-		packageEntries  $pythonPackage \
+		packageEntries $pythonPackage \
 			$prefix/lib/python*
 	done
 }