python - 使用 python 在 nautilus 扩展中使用 gtk

Question

下面的代码

import gtk
import nautilus
import os
def alert(message):
    """A function to debug"""
    dialog = gtk.MessageDialog(None, gtk.DIALOG_MODAL, gtk.MESSAGE_INFO, gtk.BUTTONS_CLOSE, message)
    dialog.run()
    dialog.destroy()

class TestExtension(nautilus.MenuProvider):
    def __init__(self):
        pass

    def get_file_items(self, window, files):
        items = []
        """Called when the user selects a file in Nautilus."""
        item = nautilus.MenuItem("NautilusPython::test_item", "Test", "Test")
        item.connect("activate", self.menu_activate_cb, files)
        items.append(item)
        return items

    def menu_activate_cb(self, menu, files):
        """Called when the user selects the menu."""
        for name in files:
            alert(name)

不产生任何消息。
然而

import easygui
import nautilus
import os

def alert(message):
    """A function to debug"""
    easygui.msgbox(message)

class TestExtension(nautilus.MenuProvider):
    def __init__(self):
        pass

    def get_file_items(self, window, files):
        items = []
        """Called when the user selects a file in Nautilus."""
        item = nautilus.MenuItem("NautilusPython::test_item", "Test", "Test")
        item.connect("activate", self.menu_activate_cb, files)
        items.append(item)
        return items

    def menu_activate_cb(self, menu, files):
        """Called when the user selects the menu."""
        for name in files:
            alert(name)

运行良好并生成请求的消息。

有人可以解释这个 - 或者更好 - 提供解决方法吗？

(更好的是，当将 alert() 调用移动到 get_file_items() 时，消息会正确显示)

Answer 1

关于nautilus mailing list Ahmad Sherif 发现了我的错误:

gtk.MessageDialog is not working with your code because the fifth argument has to be either string or None, and the variable name is of type nautilus.FileInfo, which means you need to call alert(name.get_name()) not just alert(name)
Please refer to the docs for more info about nautilus.FileInfo.

感谢 Ahmad 指出这一点。

在 second posting 中Ahmad 解释了如何更好地调试:

I think you could've obtained such debug info if you launched Nautilus from terminal. […]
You should quit Nautilus first (nautilus -q) then launch it (nautilus --no-desktop). If [nautilus] did [automatically] re-spawn [after quitting], you should edit /usr/share/applications/nautilus.desktop as follows (A backup of it would be a good idea):

• Replace "X-GNOME-AutoRestart=true" with "X-GNOME-AutoRestart=false"
• Comment this line out "X-GNOME-Autostart-Phase=Desktop" by "#" at the beginning of the line. Actually I forgot why I did this but this how my is my configuration :).
• Add this line "AutostartCondition=GNOME /apps/nautilus/preferences/show_desktop"
• Finally, you should restart your session, then try quitting and launching again.

Credits go to wrc1944 […] for the respawning solution.

应用 Ahmad 解释的步骤，我能够看到我的错误代码生成的错误消息。