PyGObject：如何使用線程中的對象？

Question

有沒有辦法在主線程中創建對象並使用它們？我已閱讀this link，但不明白如何將其應用於我的示例（請參見下文）。

import threading 

from gi.repository import Gtk, Gdk, GObject, GLib 


class Foo: 

    def bar(self): 
     pass 


class ListeningThread(threading.Thread): 

    def __init__(self): 
     threading.Thread.__init__(self) 
     self.cls_in_thread = None 

    def foo(self, _): 
     self.cls_in_thread = Foo() 
     print(threading.current_thread()) 
     print('Instance created') 

    def bar(self, _): 
     self.cls_in_thread.bar() 
     print(threading.current_thread()) 
     print('Instance method called') 

    def run(self): 
     print(threading.current_thread()) 


def main_quit(_): 
    Gtk.main_quit() 


if __name__ == '__main__': 
    GObject.threads_init() 

    window = Gtk.Window() 
    box = Gtk.Box(spacing=6) 
    window.add(box) 

    lt = ListeningThread() 
    lt.daemon = True 
    lt.start() 
    button = Gtk.Button.new_with_label("Create instance in thread") 
    button.connect("clicked", lt.foo) 

    button2 = Gtk.Button.new_with_label("Call instance method in thread") 
    button2.connect("clicked", lt.bar) 

    box.pack_start(button, True, True, 0) 
    box.pack_start(button2, True, True, 0) 

    window.show_all() 
    window.connect('destroy', main_quit) 

    print(threading.current_thread()) 
    Gtk.main() 

更準確地說這裏是輸出我現在得到：

<ListeningThread(Thread-1, started daemon 28268)> 
<_MainThread(MainThread, started 23644)> 
<_MainThread(MainThread, started 23644)> 
Instance created 
<_MainThread(MainThread, started 23644)> 
Instance method called 

而且我想它是有點像這樣：

<ListeningThread(Thread-1, started daemon 28268)> 
<_MainThread(MainThread, started 23644)> 
<ListeningThread(Thread-1, started daemon 28268)> 
Instance created 
<ListeningThread(Thread-1, started daemon 28268)> 
Instance method called 

而且我想是確定cls_in_thread存在於同一個線程中（在文檔中我找到了threading.local()，但我不確定是否需要）。有沒有辦法實現這種行爲？

Answer 1

這裏是做一種方式的示例：pithos/gobject_worker.py

你有你想要在另一個線程，然後一旦工作完成回調被稱爲主線程工作隊列。

同樣也意識到你不應該從另一個線程修改主線程上的對象。