我正在尝试构建一个记事本，但是我的save和saveas按钮出现问题，因为TextField中的内容没有保存，文本文档始终返回空，这是我的代码：

def saveFile():
    global infile
    global in_path
    global txt
    try:
        if in_path == '':
    #save as new file
            in_path = asksaveasfile(initialfile='Untitled.txt',defaultextension='txt',filetypes=[("All Files","*.*"),("Text Documents","*txt")])
            if in_path == "":
                in_path = None
            else:
                #try to save file
                with open(in_path,"w") as infile:
                   data = (txt.get(1.0,END))
                   infile.write(data)

                    #change the window title
                root.title(os.path.basename(in_path))
        else:
            #try to save file
            with open(in_path,"w") as infile:
                infile.write(txt.get(1.0,END))
                #change the window title
                root.title(os.path.basename(in_path))
    except:
        pass        
def saveAs():
    global infile
    global in_path
    global txt
    try:
    #save as new file
        in_path = asksaveasfile(initialfile='Untitled.txt',"*txt")])
        if in_path == " ":
            in_path = None
        else:
                #try to save file
            with open(in_path,END))
                #change the window title
            root.title(os.path.basename(in_path))
    except:
            pass