运行python脚本/ GTKBuilder应用程序时出现分段错误?

时间:2012-06-16 03:11:25

标签: python segmentation-fault pygtk

我正在尝试使用python2和GTKBuilder学习GUI编程,但是在运行代码时出现了分段错误。这是我的文件,在Glade中创建为GTKBuilder文件:

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <!-- interface-requires gtk+ 3.0 -->
  <object class="GtkWindow" id="mainWindow">
    <property name="can_focus">False</property>
    <child>
      <object class="GtkBox" id="box1">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="orientation">vertical</property>
        <child>
          <object class="GtkBox" id="box2">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="halign">start</property>
            <property name="margin_left">146</property>
            <property name="margin_right">276</property>
            <child>
              <object class="GtkLabel" id="label1">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">label</property>
              </object>
              <packing>
                <property name="expand">True</property>
                <property name="fill">False</property>
                <property name="position">0</property>
              </packing>
            </child>
            <child>
              <object class="GtkEntry" id="entryName">
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="margin_bottom">4</property>
                <property name="hexpand">True</property>
                <property name="vexpand">True</property>
                <property name="invisible_char">●</property>
                <property name="placeholder_text">Please enter your name here...</property>
              </object>
              <packing>
                <property name="expand">True</property>
                <property name="fill">True</property>
                <property name="position">1</property>
              </packing>
            </child>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <object class="GtkButton" id="buttonWriteNameToFile">
            <property name="label" translatable="yes">button</property>
            <property name="use_action_appearance">False</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
            <property name="use_action_appearance">False</property>
            <signal name="clicked" handler="buttonWriteNameToFile_clicked" swapped="no"/>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">1</property>
          </packing>
        </child>
        <child>
          <placeholder/>
        </child>
        <child>
          <placeholder/>
        </child>
      </object>
    </child>
  </object>
</interface>

基于this question的我的python代码是这样的:

#!/usr/bin/env python

import gtk

class NameApp:
    def __init__(self):
        filename = "project.glade"
        builder = gtk.Builder()
        builder.add_from_file(filename)
        builder.connect_signals(self)
        builder.get_object("mainWindow").show_all() 

    def buttonWriteNameToFile_clicked(self, widget):
        print("File write code...")

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

使用python2运行文件会产生此错误:

name.py:9: Warning: cannot create instance of abstract (non-instantiatable) type `GtkBox'
  builder.add_from_file(filename)
./geany_run_script.sh: line 5: 14897 Segmentation fault      python2 "name.py"

我认为我尽可能地遵循了这个例子,并且我没有看到GTKBuilder文件之外的任何差异。但是,链接问题中的示例在我的计算机上成功运行。我不知道它是否相关,但我正在运行Arch Linux x86_64。

2 个答案:

答案 0 :(得分:4)

如果您更喜欢3.x版本(因为它可以在您的Glade文件中读取),您必须使用GObject Introspection模块中的GTK。您的修改后的代码如下。

#!/usr/bin/env python

#import gtk
from gi.repository import Gtk 

class NameApp:
    def __init__(self):
        filename = "test.glade"
        builder = Gtk.Builder()
        builder.add_from_file(filename)
        builder.connect_signals(self)
        builder.get_object("mainWindow").show_all() 

    def buttonWriteNameToFile_clicked(self, widget):
        print("File write code...")

if __name__ == "__main__":
    app = NameApp()
    Gtk.main()

在GTK的2.x版本中,窗口小部件GtkBox是抽象的,因此您无法实例化它。您可以使用GtkHBox或GtkVBox。

答案 1 :(得分:0)

您使用GTK 3.0构建了Glade文件,其中Box是常规窗口小部件。在GTK 2中,它是一个抽象类,您必须使用VBoxHBox。您的Python脚本使用的是GTK 2,因此无法加载Glade文件。

转到Glade中的项目首选项并选择低于3.0的GTK版本。