将PyGObject中的线程与python3中的GTK3配合使用
将PyGObject中的线程与python3中的GTK3配合使用
提问于 2016-03-18 03:22:08
因此，我尝试使用线程在基于Python3的应用程序中实现阻塞操作。
#!/usr/bin/env python3
import gi, os, threading, Skype4Py
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, GLib, GObject
skype = Skype4Py.Skype()
def ConnectSkype():
skype.Attach()
class Contacts_Listbox_Row(Gtk.ListBoxRow):
def __init__(self, name):
# super is not a good idea, needs replacement.
super(Gtk.ListBoxRow, self).__init__()
self.names = name
self.add(Gtk.Label(label=name))
class MainInterfaceWindow(Gtk.Window):
"""The Main User UI"""
def __init__(self):
Gtk.Window.__init__(self, title="Python-GTK-Frontend")
# Set up Grid object
main_grid = Gtk.Grid()
self.add(main_grid)
# Create a listbox which will contain selectable contacts
contacts_listbox = Gtk.ListBox()
for handle, name in self.GetContactTuples():
GLib.idle_add(contacts_listbox.add, Contacts_Listbox_Row(name))
GLib.idle_add(main_grid.add, contacts_listbox)
# Test label for debug
label = Gtk.Label()
label.set_text("Test")
GLib.idle_add(main_grid.attach_next_to, label, contacts_listbox, Gtk.PositionType.TOP, 2, 1)
def GetContactTuples(self):
"""
Returns a list of tuples in the form: (username, display name).
Return -1 if failure.
"""
print([(user.Handle, user.FullName) for user in skype.Friends]) # debug
return [(user.Handle, user.FullName) for user in skype.Friends]
if __name__ == '__main__':
threads = []
thread = threading.Thread(target=ConnectSkype) # potentially blocking operation
thread.start()
threads.append(thread)
main_window = MainInterfaceWindow()
main_window.connect("delete-event", Gtk.main_quit)
main_window.show_all()
print('Calling Gtk.main')
Gtk.main()基本思想是这个简单的程序应该从Skype API获取一个联系人列表，并构建一个元组列表。GetContactTuples函数设计成功，我发出的打印调用验证了这一点。但是，程序会无限期地挂起，并且永远不会呈现界面。有时，它会产生涉及线程和/或资源可用性的随机错误。一旦这样的错误被
(example.py:31248): Gdk-WARNING **: example.py: Fatal IO error 11 (Resource temporarily unavailable) on X server :1.我知道这与线程的使用有关，但根据文档here，在接口更新之前添加GLib.idle_add调用似乎就足够了。因此，问题是，为什么这不起作用，以及我如何更正上面的示例？
更新:如果将GLib.idle_add放在与GTK交互的每一行前面，我会得到一个不同的错误。[xcb] Unknown request in queue while dequeuing [xcb] Most likely this is a multi-threaded client and XInitThreads has not been called [xcb] Aborting, sorry about that. python: xcb_io.c:179: dequeue_pending_request: Assertion '!xcb_xlib_unknown_req_in_deq' failed. Aborted (core dumped)
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-05-30 07:02:05
根据您的库版本(在Gobject 3.10.2中不再需要)，您实际上可能需要使用GObject.threads_init()显式初始化线程，如下所示：
if __name__ == '__main__':
threads = []
thread = threading.Thread(target=ConnectSkype) # potentially blocking operation
thread.start()
threads.append(thread)
main_window = MainInterfaceWindow()
main_window.connect("delete-event", Gtk.main_quit)
GObject.threads_init()
main_window.show_all()
print('Calling Gtk.main')
Gtk.main()页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/36069835
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