Ironpython + WPF에서 문자를 출력하고 싶습니다. 어떻게 코드를 작성해야 할까요?

[Xaml Code]
 
 
 
 
<Window
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     Title="WpfApplication3" Height="300" Width="300">
     <Grid>
         <TextBlock x:Name="TextBlock" HorizontalAlignment="Left" Margin="10,10,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="272" Height="192"/>
         <Button x:Name="Button" Content="Button" HorizontalAlignment="Left" Margin="108,219,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click">
         </Button>
     </Grid>
 </Window>
 
 
 
 
 
 
 
 
 
 
[Ironpython Code]
 
 
 
 
import wpf
import System
import clr
 
from System.Windows import Application, Window
from System import String
 
class MyWindow(Window):
     def __init__(self):
         wpf.LoadComponent(self, 'iron3.xaml')
 
 
 
    def run(self):
         a = System.String("1")
         self.TextBlock.Text += a
 
     def Button_Click(self, sender, e):
         self.Close()
 
 
if __name__ == '__main__':
     Application().Run(MyWindow())