Adding python implementation as python3-qrcodegen.

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

debian/control

@@ -4,7 +4,10 @@ Priority: optional
 Maintainer: Daniel Baumann <daniel@debian.org>
 Build-Depends:
  debhelper-compat (= 13),
+ dh-sequence-python3,
  node-typescript,
+ python3-all,
+ python3-setuptools,
  terser,
 Rules-Requires-Root: no
 Standards-Version: 4.7.2
@@ -27,3 +30,17 @@ Description: QR Code generator library (javascript)
  Model 2 standard.
  .
  This package contains the javascript implementation.
+
+Package: python3-qrcodegen
+Architecture: all
+Section: python
+Depends:
+ ${misc:Depends},
+ ${python3:Depends},
+Description: QR Code generator library (Python)
+ The Nayuki QR Code generator library aims to be the best library for generating
+ QR Codes by providing flexible options and absolute correctness. It supports
+ all 40 versions (sizes) and all 4 error correction levels, as per the QR Code
+ Model 2 standard.
+ .
+ This package contains the Python implementation.

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
 
@@ -25,3 +33,7 @@ override_dh_auto_install:
 	ln -s /usr/share/qr-code-generator/javascript/qrcodegen.js debian/libjs-qrcodegen/usr/share/javascript/qrcodegen/qrcodegen.js
 	ln -s /usr/share/qr-code-generator/javascript/qrcodegen.min.js debian/libjs-qrcodegen/usr/share/javascript/qrcodegen/qrcodegen.min.js
 	ln -s /usr/share/qr-code-generator/javascript/qrcodegen.min.js.map debian/libjs-qrcodegen/usr/share/javascript/qrcodegen/qrcodegen.min.js.map
+
+	# python3-qrcodegen
+	mkdir -p debian/python3-qrcodegen/usr/share/doc/python3-qrcodegen/examples
+	cp python/*demo* debian/python3-qrcodegen/usr/share/doc/python3-qrcodegen/examples