'gi.repository.Gtk' object has no attribute 'gdk'

Question

I'm trying to create a multiple threading with GTK. Gtk.gdk is needed but i received error about no gdk attribute. I'm using a Raspberry Pi with Raspbian.

This is how i import GTK library.

try:  
    import pygtk
    pygtk.require("2.0")  
except:  
    pass  

try:  
    from gi.repository import Gtk
except:  
    print("GTK Not Available")
    sys.exit(1)

Gtk.gdk.threads_init()

and this is the error i received.

AttributeError'gi.repository.Gtk' object has no attribute 'gdk'

Any idea?

Updates : I'm following this tutorial http://faq.pygtk.org/index.py?req=show&file=faq14.023.htp which are using both GObject.threads_init() & Gtk.gdk.threads_init(). I have no problem using GObject but gdk.

Quickwitted

what is the point of requiring pygtk and then ignoring the exception when "require" fails? you should decide whether you are using the old pygtk or gi.repository – Interlocution

This is what i get from some tutorials. gi.repository is the one i'm using. I had tried both pygtk and gi.repository but both of them do not have gdk, which i don't understand why. I had go through the gtk documentation manual, which gdk should be there. – Quickwitted

You are confusing the old pygtk API where one would import gtk and then access gtk.<identifier> and gtk.gdk.<identifier>. This is what the FAQ entry you wrote in the comment is using. For GTK3 the pygtk bindings are no longer maintained, and one is supposed to switch to gobject-introspection. That is the 2nd style (not mentioned in the FAQ, which is the old PyGTK FAQ), from gi.repository import Gtk, Gdk and then access Gtk.<identifier> and Gdk.<identifier>. – Interlocution

Thanks for your explanation. I did tried with import gtk and gtk.<identifier> but it is like not threading. My UI will continue freeze until the task performs finish. I could hardly find any reference about gdk.<identifier> threading, all is using gtk.gdk.<identifier>. What if I hope to use gtk.gdk.<identifier>? by importing the old pygtk? – Quickwitted

It is getting very hard to follow you at this point. Maybe you could post a separate question that describes the threading problem that you had? Whatever you do, you should not mix old and new syntaxes - pick between import gtk and from gi.repository import Gtk, and use it consistently. – Interlocution

Answer 1

I think the equivalent of the old-style gtk.gdk.threads_init() is:

from gi.repository import Gdk
Gdk.threads_init()

However, as the FAQ warns, threading is not a clean way to achieve this goal. A much better way is to use GObject.idle_add to run a function whenever the GUI is idle.

---

"""Show a shell command's output in a gtk.TextView without freezing the UI"""

import os
import locale
import subprocess
import shlex
import gi.repository.Gtk as gtk
from gi.repository import GObject
PIPE = subprocess.PIPE

encoding = locale.getpreferredencoding()


def utf8conv(x):
    return unicode(x, encoding).encode('utf8')


class MyWindow:
    def __init__(self):
        sw = gtk.ScrolledWindow()
        sw.set_policy(gtk.PolicyType.AUTOMATIC, gtk.PolicyType.AUTOMATIC)
        textview = gtk.TextView()
        textbuffer = textview.get_buffer()
        sw.add(textview)
        win = gtk.Window()
        win.resize(300, 500)
        win.connect('delete-event', gtk.main_quit)

        self.button_sim = gtk.Button(u"Press me!")
        self.button_abort = gtk.Button("Abort")
        self.button_quit = gtk.Button("Quit")

        command = 'ls -R %s' % (os.getcwd(),)
        self.button_sim.connect(
            "clicked", self.on_button_clicked, textview, textbuffer, command)
        self.button_abort.connect("clicked", self.on_abort)
        self.button_quit.connect("clicked", self.main_quit)

        vbox = gtk.VBox()
        vbox.pack_start(self.button_sim, expand=False, fill=False, padding=0)
        vbox.pack_start(self.button_abort, expand=False, fill=False, padding=0)
        vbox.pack_start(self.button_quit, expand=False, fill=False, padding=0)
        vbox.pack_start(sw, expand=True, fill=True, padding=0)
        win.add(vbox)
        win.show_all()

    def read_output(self, view, buffer, command):
        yield True  # allow the UI to refresh
        proc = subprocess.Popen(
            shlex.split(command), stderr=PIPE, stdout=PIPE)
        while True:
            if self.job_aborted:
                print('user aborted')
                proc.terminate()
                break

            try:
                line = proc.stdout.readline()
                if line:
                    it = buffer.get_end_iter()
                    buffer.place_cursor(it)
                    buffer.insert(it, utf8conv(line))
                    view.scroll_to_mark(buffer.get_insert(), 0.1,
                                        use_align=False, xalign=0.5, yalign=0.5)

            except IOError:
                pass

            yield True

        yield False

    def on_button_clicked(self, button, view, buffer, command):
        self.job_aborted = False
        GObject.idle_add(self.read_output(view, buffer, command).next)

    def on_abort(self, button):
        self.job_aborted = True

    def main_quit(self, obj):
        self.job_aborted = True
        gtk.main_quit()


if __name__ == "__main__":
    app = MyWindow()
    gtk.main()

Found

Thanks for your reply, I'm using this as well without problem. I'm trying to follow this tutorial faq.pygtk.org/index.py?req=show&file=faq14.023.htp which used both GObject.threads_init() & Gtk.gdk.threads_init() – Quickwitted

I had tried from gi.repository import Gdk Gdk.threads_init() aswell. It runs without error. however it's like not threading. My UI continues freezing until the task performs finish. What i'm thinking is Gdk equal to Gtk.gdk? – Quickwitted

AttributeError: 'gi.repository.Gdk' object has no attribute 'Pixbuf' – Schiffman

I actually have many AttributeErrors in different parts, like AttributeError: 'gi.repository.Gtk' object has no attribute 'settings_get_for_screen'. It seems that gi.repository.Gtk has many differences with the standard one gtk. How to solve this? – Schiffman

Answer 2

Since you are using gtk from gi.repository.Gtk, you could try to get the gdk in a similar way but please note that its attribute might differ from the original gtk.gdk.

from gi.repository import Gdk as gdk

Skivvy