Python GTK+；3是否只调出一个文件选择器对话框？

我正在尝试创建一个使用Gtk FileChooserDialog对话框的程序。我遵循了教程，它很有效。但是，我希望只弹出对话框，而不必处理实际的Gtk窗口

在删除

\uuuu init\uuu

中已有的代码后，我尝试将教程中位于

on\u clicked（）

函数中的代码放入

\uuuu init\uuuu

函数中（并稍微调整它，使其看起来可以工作）：

class FileChooserWindow(Gtk.Window):

    def __init__(self):
        global path

        dialog = Gtk.FileChooserDialog("Please choose a file", self,
            Gtk.FileChooserAction.OPEN,
            (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
             Gtk.STOCK_OPEN, Gtk.ResponseType.OK))

        self.add_filters(dialog)

        response = dialog.run()
        if response == Gtk.ResponseType.OK:
            print("Open clicked")
            print("File selected: " + dialog.get_filename())
            path = dialog.get_filename()
            dialog.destroy()
        elif response == Gtk.ResponseType.CANCEL:
            print("Cancel clicked")
            dialog.destroy()

    def add_filters(self, dialog):
        filter_any = Gtk.FileFilter()
        filter_any.set_name("Any files")
        filter_any.add_pattern("*")
        dialog.add_filter(filter_any)

        filter_text = Gtk.FileFilter()
        filter_text.set_name('Text files')
        filter_text.add_mime_type('text/plain')
        dialog.add_filter(filter_text)

        filter_py = Gtk.FileFilter()
        filter_py.set_name('Python files')
        filter_py.add_mime_type('text/x-python')
        dialog.add_filter(filter_py)

        filter_img = Gtk.FileFilter()
        filter_img.set_name('Image')
        filter_img.add_mime_type('image/*')
        dialog.add_filter(filter_img)

win = FileChooserWindow()
win.connect("delete-event", Gtk.main_quit)
win.show_all()
Gtk.main()

但它只返回以下错误：

Traceback (most recent call last):
  File "base.py", line 152, in <module>
    win = FileChooserWindow()
  File "base.py", line 38, in __init__
    Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 175, in new_init
    return super_init_func(self, **new_kwargs)
  File "/usr/lib/python3/dist-packages/gi/overrides/Gtk.py", line 500, in __init__
    self._init(*args, **new_kwargs)
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 175, in new_init
    return super_init_func(self, **new_kwargs)
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 175, in new_init
    return super_init_func(self, **new_kwargs)
TypeError: could not convert value for property `transient_for' from FileChooserWindow to GtkWindow

Traceback (most recent call last):
  File "scriptname.py", line 57, in <module>
    win.connect("delete-event", Gtk.main_quit)
TypeError: object at 0x7ff81d5dedc0 of type FileChooserWindow is not initialized
CRITICAL: Exiting due to uncaught exception <class 'TypeError'>

回溯（最近一次呼叫最后一次）：
文件“base.py”，第152行，在
win=FileChooserWindow（）
文件“base.py”，第38行，在_init中__
Gtk.STOCK_OPEN，Gtk.ResponseType.OK））
文件“/usr/lib/python3/dist packages/gi/overrides/_init__.py”，第175行，在new_init中
返回超级初始化函数（self，**新建）
文件“/usr/lib/python3/dist packages/gi/overrides/Gtk.py”，第500行，在__
self._init（*args，**new_kwargs）
文件“/usr/lib/python3/dist packages/gi/overrides/_init__.py”，第175行，在new_init中
返回超级初始化函数（self，**新建）
文件“/usr/lib/python3/dist packages/gi/overrides/_init__.py”，第175行，在new_init中
返回超级初始化函数（self，**新建）
TypeError:无法将属性“transient_for”的值从FileChooserWindow转换为GtkWindow

---

有人知道只打开Gtk文件选择器对话框的正确方法吗？

当您在第6行声明对话框时：

dialog = Gtk.FileChooserDialog("Please choose a file", self,  

self

是该对话框的父级。要创建没有父级的对话框，请将其设置为

None

，如下所示：

dialog = Gtk.FileChooserDialog("Please choose a file", None,

---

@上述Seths解决方案因以下错误而崩溃：

Traceback (most recent call last):
  File "base.py", line 152, in <module>
    win = FileChooserWindow()
  File "base.py", line 38, in __init__
    Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 175, in new_init
    return super_init_func(self, **new_kwargs)
  File "/usr/lib/python3/dist-packages/gi/overrides/Gtk.py", line 500, in __init__
    self._init(*args, **new_kwargs)
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 175, in new_init
    return super_init_func(self, **new_kwargs)
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 175, in new_init
    return super_init_func(self, **new_kwargs)
TypeError: could not convert value for property `transient_for' from FileChooserWindow to GtkWindow

Traceback (most recent call last):
  File "scriptname.py", line 57, in <module>
    win.connect("delete-event", Gtk.main_quit)
TypeError: object at 0x7ff81d5dedc0 of type FileChooserWindow is not initialized
CRITICAL: Exiting due to uncaught exception <class 'TypeError'>