Python and GObject Introspection
- 1. Python and GObject-Introspection Yuren Ju <yurenju@gmail.com>
- 2. About me ● http://about.me/yurenju ● Hacking Thursday ● KaLUG ● Twitter: @yurenju
- 3. GObject
- 4. D-BUS notify Glade GTK VTE
- 6. Binding Library based on GObject
- 8. Use codegen to generate GTK C Wrapper for Python gtk.c number of lines: 128,469
- 9. If GTK+ add APIs in new version, python-gtk also need to upgrade for new APIs.
- 10. Implement in Python, Also need to re-implement in Ruby, Perl, Java, Javscript again.
- 12. Original python-gobject metadata GTK+ GTK+
- 13. GObject-Introspection python-gobject parser metadata GTK+ GTK+
- 14. Same metadata format python-gobject parser metadata metadata metadata GTK+GTK+ gstreamer GTK+ ... GTK+
- 15. Parser + metadata = GObject-Introspection
- 16. tut-triangle tut.triangle + get_color() + set_color() + get_centroid() + get_centroidu()
- 17. Metadata Comments in Source code g-ir-scanner Gir XML file g-ir-compiler Typelib binary file
- 18. Comments in Source code http://live.gnome.org/GObjectIntrospection/Annotations
- 19. Gir XML file
- 20. Metadata Comments in Source code g-ir-scanner Gir XML file g-ir-compiler libgirepository Typelib binary file
- 21. python-gobject PyGTK 2.24.0 has been released. This is a stable release supporting the GTK+ 2.24 API. New users wishing to develop Python applications using GTK+ are recommended to use the GObject-Introspection features available in PyGObject. Existing authors of PyGTK applications are also recommended to port their applications to PyGObject to take advantage of new features appearing in GTK-3 and beyond.
- 22. gtk.c number of lines: 128,469
- 23. How to use GI? from gi.repository import Gtk;
- 24. PEP-0302: New Import Hooks Append finder to sys.meta_path, Use finder.find_module() dynamic to find module.
- 25. Load module ● find_module() ● load_module() ● Create DynamicModule ● Module._load() – Create self._introspection_module ● IntrospectionModule => repository.requre to load typelib
- 26. Object from gi.repository import Gtk - Widget - Container Initial all items in Gtk - Window Get info from ...etc. repository.find_by_name() If item is a object instance, Use a MetaClass “GobjectMeta” to create a class wrapper Finally, you have a Python Class to create Object!
- 27. Method – relative easy object.method() Call info.invoke() g_function_info_invoke
- 28. Summary ● GI Migrate metadata from language-binding to library ● python-gobject let you use GTK, GObject, Gstreamer, VTE, Dbus,...etc.
- 29. 一人成佛，雞犬升天