ttk Treeview：如何选择一行？

Question

这一定是简单的我很想念，但我似乎无法弄清楚如何使用selection_set方法在Treeview中设置选择行。对于方法参数，我对tkk文档感到困惑，它有时引用“项目”，其他时间为“iid”。当我向树状图中插入一行时，是不是创建一个项目，我给它的句柄iid？

import Tkinter as Tk 
import ttk 

root = Tk.Tk() 
tree = ttk.Treeview(root, displaycolumns='#all') 
tree["columns"]=("1", "2", "3", "4") 
tree.column("#0", width=70) 
tree.column("1", width=70, anchor=Tk.CENTER) 
tree.column("2", width=50, anchor=Tk.CENTER) 
tree.column("3", width=50, anchor=Tk.CENTER) 
tree.column("4", width=70, anchor=Tk.CENTER) 
tree.heading("1", text="Column 1") 
tree.heading("2", text="Column 2") 
tree.heading("3", text="Column 3") 
tree.heading("4", text="Column 4") 
id2 = [] 
count = 0 
item_list = ['A', 'B', 'C', 'D'] 
for item in item_list: 
    id = tree.insert("", count, iid='Row %s'%count, text=item, values=('1', '2', '3', '4')) 
    id2.append(id) 
    count += 1 

tree.selection_set('Row 0')   #Doesn't work -- returns "_tkinter.TclError: Item Row not found" 
tree.pack(fill=Tk.BOTH, expand=1, side=Tk.RIGHT,padx=50) 

Tk.mainloop() 

回溯：

Traceback (most recent call last): 
    File "python-ttk-treeview-how-to-select-a-row.py", line 28, in <module> 
    tree.selection_set('Row 0')   #Doesn't work -- returns "_tkinter.TclError: Item Row not found" 
    File "C:\Python\lib\lib-tk\ttk.py", line 1402, in selection_set 
    self.selection("set", items) 
    File "C:\Python\lib\lib-tk\ttk.py", line 1397, in selection 
    return self.tk.call(self._w, "selection", selop, items) 
_tkinter.TclError: Item Row not found 

Answer 1

这是因为你有嵌入在选择名称空间。根据答案this question你只能做的是通过使用这样的事情：

tree.selection_set('"Row 0"') # Does work 

线索是错误消息，这表示Item Row not found没有Item Row 0 not found。