由于 TreeViewiter 父级，使用生成器进行线程和回调将元素添加到 TreeView 时，pygtk 断言失败

Question

使用 http://unpythonic.blogspot.com/ 中的 Generator 类2007/08/using-threads-in-pygtk.html，以下代码使我的程序失败：

import gtk
import gobject
from GeneratorTask import GeneratorTask

GeneratorTask(self.get_playlist, self.load_playlist).start(playlist_id, model, iter, child)

def get_playlist(self, playlistId=None, treeModel=None, treeIter=None):
    if playlistId is None:
        yield (ten.getRootPlaylist(depth=1), treeModel, treeIter)
    else:
        yield (ten.getPlaylist(playlistId, depth=1), treeModel, treeIter)

def load_playlist(self, playlist, treeModel=None, treeIter=None):
    if treeModel == None:
        treeModel = self.programme

    # Setting treeIter = None prevents assertion fail but 
    # obviously doesn't append the items under the parent
    if len(playlist.find('childPlaylists')):
        for childPlaylist in playlist.find('childPlaylists').findall('playlist'):
            series_iter = treeModel.append(treeIter, [formatTitle(childPlaylist.find('title').text), childPlaylist.find('id').text, True, childPlaylist])
            treeModel.append(series_iter, ['Loading...', None, None, None]) 
    elif len(playlist.find('mediaList')):
        for media in playlist.find('mediaList').findall('media'):
            treeModel.append(treeIter, [media.find('title').text, media.find('id').text, False, media])

问题似乎是传递父级（代码中的“treeIter”）失去了正确的引用并且不再有效当回调被调用时。

如何正确执行此操作，以确保在正确的父节点下添加新节点，同时仍保持某种事件线程（由于 ten.getPlaylist 函数将阻塞，因此需要一些线程）？

Answer 1

只是记得，当我浏览 lablgtk 教程时，有人暗示 Gtk.tree_iters 是短暂的，并且有人建议使用 Gtk.row_references 代替。抱歉，这不是 python，但是您可能会发现它很有用： lablgtk:treeview:引用行