无法在 Tkinter 中禁用自动换行

我正在尝试在禁用自动换行的文本窗口中书写 &水平滚动条，像这样:

I'm trying to write in a text window with word wrapping disabled & horizontal scrollbar, like this:

root = Toplevel()
root.geometry("%dx%d+0+0" % (350,400))
af=Frame(root)
chtext = Text(af, width=45, wrap=None,font=("Arial",12)) 
chxscrollbar=Scrollbar(chtext, orient=HORIZONTAL, command=chtext.xview)
chtext["xscrollcommand"]=chxscrollbar.set
af.pack(fill="both", expand=True)
chtext.pack(side="left", expand=1, fill="both")
chxscrollbar.pack(side="bottom", fill="x", expand=False)

我的问题是它仍然对我写的内容进行自动换行...我是否遗漏了一些明显的东西???

my problem is that it still wordwraps what I write into it... am I missing something obvious???

谢谢！