kazam 失败并显示“PyGIWarning：Gtk 已导入但未先指定版本...”

Question

安装kazam投屏软件后，无法启动。

我使用的是 Ubuntu 17.04。

更新：

    /usr/bin/kazam:32: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk
/usr/lib/python3/dist-packages/kazam/frontend/window_area.py:30: PyGIWarning: Wnck was imported without specifying a version first. Use gi.require_version('Wnck', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk, GObject, Gdk, Wnck, GdkX11
/usr/lib/python3/dist-packages/kazam/backend/gstreamer.py:35: PyGIWarning: Gst was imported without specifying a version first. Use gi.require_version('Gst', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import GObject, Gst
/usr/lib/python3/dist-packages/kazam/frontend/indicator.py:148: PyGIWarning: AppIndicator3 was imported without specifying a version first. Use gi.require_version('AppIndicator3', '0.1') before import to ensure that the right version gets loaded.
  from gi.repository import AppIndicator3
/usr/lib/python3/dist-packages/kazam/frontend/indicator.py:97: PyGIWarning: Keybinder was imported without specifying a version first. Use gi.require_version('Keybinder', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Keybinder
Segmentation fault (core dumped)

Answer 1

只需安装即可python3-xlib解决您使用 Kazam 的特定分段错误问题，但您可能已经注意到仍然存在一些有关“未先指定版本”导入的 PyGI 警告。

由于这个问题是谷歌关于此类警告的#1（这就是我在这里偶然发现的），因此这就是如何更改代码以防止此类警告，如警告本身所述。

代替：

from gi.repository import Gtk, GObject, Gdk, Wnck, GdkX11, Gst, AppIndicator3

它会发出几个警告：

from gi.repository import Gtk, GObject, Gdk, Wnck, GdkX11, Gst, AppIndicator3

根据PyGOobject 官方文档，使用它：

import gi
gi.require_version('Gtk', '3.0')
gi.require_version('Wnck', '3.0')
gi.require_version('Gst', '1.0')
gi.require_version('AppIndicator3', '0.1')
from gi.repository import Gtk, GObject, Gdk, Wnck, GdkX11, Gst, AppIndicator3

显然并非所有的gi子模块都需要指定版本。

或者，您可以使用该require_versions()函数（注意复数）在单个语句中要求所有版本，该函数采用模块及其各自版本的单个字典：

import gi
gi.require_versions({
    'Gtk':  '3.0',
    'Wnck': '3.0',
    'Gst':  '1.0',
    'AppIndicator3': '0.1',
})
from gi.repository import Gtk, GObject, Gdk, Wnck, GdkX11, Gst, AppIndicator3

该函数并未在官方文档中列出，但在 2016 年发布的PyGObject 3.21.0中添加了该函数。