How to connect to a glade created gtktreeview widget with python 29.09.20

main.py

#!/usr/bin/env python3
import gi

gi.require_version("Gtk", "3.0")
from gi.repository import Gtk

class Handler:
    def onDestroy(self, *args):
        Gtk.main_quit()

def onButtonPressed(self, button):
        print("Hello World!")

columns = ["First Name",
           "Last Name",
           "Phone Number"]

phonebook = [["Jurg", "Billeter", "555-0123"],
             ["Johannes", "Schmid", "555-1234"],
             ["Julita", "Inca", "555-2345"],
             ["Javier", "Jardon", "555-3456"],
             ["Jason", "Clinton", "555-4567"],
             ["Random J.", "Hacker", "555-5678"]]
listmodel = Gtk.ListStore(str, str, str)
for i in range(len(phonebook)):
            listmodel.append(phonebook[i])

builder = Gtk.Builder()
builder.add_from_file("layout.glade")
#builder.connect_signals(Handler())

view = builder.get_object("category")
view.set_model(listmodel)

for i, column in enumerate(columns):
    # cellrenderer to render the text
    cell = Gtk.CellRendererText()
    # the text in the first column should be in boldface
    if i == 0:
        cell.props.weight_set = True
        # the column is created
    col = Gtk.TreeViewColumn(column, cell, text=i)
    # and it is appended to the treeview
    view.append_column(col)

window = builder.get_object("Autotext")
window.show_all()

glade file: 
<?xml version="1.0" encoding="UTF-8"?>

<interface>
  <requires lib="gtk+" version="3.4"/>
  <object class="GtkAboutDialog" id="aboutdialog1">
    <property name="can_focus">False</property>
    <property name="border_width">5</property>
    <property name="type_hint">normal</property>
    <property name="program_name">Autotext</property>
    <property name="version">0.1</property>
    <property name="copyright" translatable="yes">GNU</property>
    <property name="website">autotext.calantas.org</property>
    <property name="license" translatable="yes">GNU</property>
    <property name="authors">Veto</property>
    <property name="logo_icon_name">image-missing</property>
    <child>
      <placeholder/>
    </child>
    <child internal-child="vbox">
      <object class="GtkBox" id="dialog-vbox1">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="spacing">2</property>
        <child internal-child="action_area">
          <object class="GtkButtonBox" id="dialog-action_area1">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="layout_style">end</property>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">False</property>
            <property name="pack_type">end</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <placeholder/>
        </child>
      </object>
    </child>
  </object>
  <object class="GtkImage" id="image1">
    <property name="visible">True</property>
    <property name="can_focus">False</property>
    <property name="stock">gtk-missing-image</property>
  </object>
  <object class="GtkImage" id="image2">
    <property name="visible">True</property>
    <property name="can_focus">False</property>
    <property name="stock">gtk-missing-image</property>
  </object>
  <object class="GtkImage" id="image3">
    <property name="visible">True</property>
    <property name="can_focus">False</property>
    <property name="stock">gtk-missing-image</property>
  </object>
  <object class="GtkListStore" id="liststore1"/>
  <object class="GtkWindow" id="Autotext">
    <property name="can_focus">False</property>
    <property name="default_width">250</property>
    <property name="default_height">750</property>
    <signal name="destroy" handler="on_window1_destroy" swapped="no"/>
    <child>
      <placeholder/>
    </child>
    <child>
      <object class="GtkBox">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="orientation">vertical</property>
        <child>
          <object class="GtkMenuBar" id="menubar1">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <child>
              <object class="GtkMenuItem" id="File">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">_File</property>
                <property name="use_underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu" id="menu1">
                    <property name="visible">True</property>
                    <property name="can_focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem1">
                        <property name="label">gtk-new</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem2">
                        <property name="label">gtk-open</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem3">
                        <property name="label">gtk-save</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem4">
                        <property name="label">gtk-save-as</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkSeparatorMenuItem" id="separatormenuitem1">
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="gtk_quit">
                        <property name="label">gtk-quit</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                        <signal name="activate" handler="on_gtk_quit_activate" swapped="no"/>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
            <child>
              <object class="GtkMenuItem" id="Edit">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">_Edit</property>
                <property name="use_underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu" id="menu2">
                    <property name="visible">True</property>
                    <property name="can_focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem6">
                        <property name="label">gtk-cut</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem7">
                        <property name="label">gtk-copy</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem8">
                        <property name="label">gtk-paste</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem9">
                        <property name="label">gtk-delete</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
            <child>
              <object class="GtkMenuItem" id="View">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">_View</property>
                <property name="use_underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu" id="menu4">
                    <property name="visible">True</property>
                    <property name="can_focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem" id="push_status">
                        <property name="label" translatable="yes">Push Status</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="image">image1</property>
                        <property name="use_stock">False</property>
                        <signal name="activate" handler="on_push_status_activate" swapped="no"/>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="pop_status">
                        <property name="label" translatable="yes">Pop Status</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="image">image2</property>
                        <property name="use_stock">False</property>
                        <signal name="activate" handler="on_pop_status_activate" swapped="no"/>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="clear_status">
                        <property name="label" translatable="yes">Clear Status</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="image">image3</property>
                        <property name="use_stock">False</property>
                        <signal name="activate" handler="on_clear_status_activate" swapped="no"/>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
            <child>
              <object class="GtkMenuItem" id="Help">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">_Help</property>
                <property name="use_underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu" id="menu3">
                    <property name="visible">True</property>
                    <property name="can_focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem" id="gtk_about">
                        <property name="label">gtk-about</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                        <signal name="activate" handler="on_gtk_about_activate" swapped="no"/>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <object class="GtkTreeView" id="category">
            <property name="name">category</property>
            <property name="width_request">200</property>
            <property name="height_request">200</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="has_tooltip">True</property>
            <property name="hexpand">True</property>
            <property name="vexpand">True</property>
            <property name="border_width">2</property>
            <property name="model">liststore1</property>
            <child internal-child="selection">
              <object class="GtkTreeSelection"/>
            </child>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">2</property>
          </packing>
        </child>
        <child>
          <placeholder/>
        </child>
        <child>
          <placeholder/>
        </child>
        <child>
          <placeholder/>
        </child>
        <child>
          <placeholder/>
        </child>
      </object>
    </child>
  </object>
</interface>

https://developer.gnome.org/gnome-devel-demos/stable/treeview_simple_liststore.py.html.en

Anonymous

How to connect to a glade created gtktreeview widget with python 29.09.20

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