Adding python implementation as python3-qrcodegen.

Signed-off-by: Daniel Baumann <daniel@debian.org>

debian/rules

@@ -1,19 +1,27 @@
 #!/usr/bin/make -f
 
+export PYBUILD_NAME=qrcodegen
+
 %:
-	dh ${@}
+	dh ${@} --buildsystem=pybuild --sourcedirectory=python
 
 execute_after_dh_auto_clean:
+	# libjs-qrcodegen
 	rm -f typescript-javascript/*.js*
 
-override_dh_auto_build:
+	# python3-qrcodegen
+	rm -rf python/*.egg-info
+
+execute_after_dh_auto_build:
+	# libjs-qrcodegen
 	cd typescript-javascript && \
 		sh ./build.sh
 
 	cd typescript-javascript && \
 		terser qrcodegen.js -c -m -o qrcodegen.min.js --source-map
 
-override_dh_auto_install:
+execute_after_dh_auto_install:
+	# libjs-qrcodegen
 	mkdir -p debian/libjs-qrcodegen/usr/share/qr-code-generator/javascript
 	cp typescript-javascript/qrcodegen.*js* debian/libjs-qrcodegen/usr/share/qr-code-generator/javascript