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So I have been trying to port a C GNOME applet to MATE, and after running into many different problems, I decided to rewrite it from scratch in python. Eventually, I found some not-horribly-out-of-date documentation, which is here: http://wiki.mate-desktop.org/docs:devel:mate-panel

Apparently the new way of writing applets in python is to use PyGObject introspection, instead of the 'old' PyGtk.

So I have a few questions:

1. Why is it better to use PyGObject instead of PyGtk etc
2. Is the end user who downloads a python applet expected to have pygobject installed? It looks like it.
3. The MATE documentation says 'ensure we are using Gtk 2, not Gtk3', but http://python-gtk-3-tutorial.readthedocs.org/en/latest/install.html says that its exclusively supports Gtk+ 3 and higher.

EDIT: If I run 

import gi
gi.require_version("Gtk", "2.0")

in a python session, I get the warning:

RuntimeWarning: You have imported the Gtk 2.0 module.  Because Gtk 2.0 was not designed for use with introspection some of the interfaces and API will fail.  As such this is not supported by the pygobject development team and we encourage you to port your app to Gtk 3 or greater. PyGTK is the recomended python module to use with Gtk 2.0

Which pretty much answers Question 3, but then brings up Question 1 again. Also, running from gi.repository import MatePanelApplet gives an ImportError Could not find any typelib for MatePanelApplet even though I have libmatepanelapplet-dev installed.

EDIT AGAIN: I found a solution to the ImportError here: Can't import Webkit from gi.repository. (Just install gir1.2-mate-panel instead of webkit)

And more errors:

./xmonad-log-applet.py:66: Warning: g_closure_set_marshal: assertion `closure != NULL' failed
  applet = MatePanelApplet.Applet()

(xmonad-log-applet.py:10928): GLib-GIO-CRITICAL **: g_dbus_connection_register_object: assertion `G_IS_DBUS_CONNECTION (connection)' failed
Segmentation fault (core dumped)
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1 回答 1

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MATE 是 GNOME 2 的一个分支，因此您应该使用 PyGTK（作为您收到的消息）。

关于每个问题：

  1. PyGObject 更好，因为您只需要一个与库（提供自省的库）的绑定，并且您可以自动访问每个支持 GOBject Introspection 的库的公共 API。对于开发人员来说是好事，因为他们可以访问与 C 相同的 API，而无需等待每个新版本的绑定。

  2. 是的。但是用户很可能会有。GNOME 3 的几率是 100%，而 GNOME 2 (MATE) 的几率较小，因为它不是必需的。

  3. 它看起来不像一个问题。正如我之前所说，MATE 是 GNOME 2 的一个版本，因此您必须使用可用于 GNOME 2 的库和文档。

您可以检查在 Python 中为 GNOME 2 编写的小程序（在 GNOME 删除 Bonobo 之后）。例如，hasmter。您可能需要更改一些名称，可能在 MATE 中将库名称从 GNOME 重命名为 MATE。

于 2013-01-06T08:37:52.767 回答