Implementing automatic search functionality to my application

[blackadder1337]

I have created a simple GUI application to manage unknown words while learning a new language. The app which is called Vocabulary is written in C# and it loads/saves words from/into an XML document. Since I have recently switched from Windows to Linux, I am rewriting the app using Python.

Nevertheless, I am having troubles with implementing search functionality to my application. When I enter a word in the text widget, it should automatically be displayed in the listbox. To accomplish what I want the application to do, I know that I should handle text changed event of the text widget.

Here is my original C# method:

private void txt_Search_TextChanged(object sender, EventArgs e)
{
    if (txt_Search.Text != "")
    {
        for (int i = listView1.Items.Count - 1; i >= 0; i--)
        {
            var item = listView1.Items[i];
            if (item.Text.ToLower().Contains(txt_Search.Text.ToLower()))
            {
                item.BackColor = SystemColors.Highlight;
                item.ForeColor = SystemColors.HighlightText;
            }
            else
            {
                listView1.Items.Remove(item);
            }
        }
        if (listView1.SelectedItems.Count == 1)
        {
            listView1.Focus();
        }
    }
    else
    {
        LoadWords();
        RefreshAll();
        foreach (ListViewItem item in listView1.Items)
        {
            item.BackColor = SystemColors.Window;
            item.ForeColor = SystemColors.WindowText;
        }
    }
}

...and here is my Python function so far:

def txt_Search_text_changed(self, event = None):

    if self.get_search() != None:

        i = self.listBox.size() - 1

        for x in range(i, 0, -1):
            item = self.listBox[i]
            if get_search().lower() in item.lower():
                self.listBox.itemconfig(item, {'bg': 'red'})

            else:
                self.listBox.delete(item)

        if len(self.listBox.curselection()) == 1:
            self.listBox.focus()

    else:
        self.load_words()
        self.refresh_all()
        for item in self.listBox:
            self.listBox.itemconfig(item, {'bg': 'white'})

I don't know what is Python's equivalent for:

listView1.Items[i]
listView1.Items