Modify the tag of the selected row in python tkinter treeview

Question

I added the following code (taken from this post), however I didn't get the desired solution.

def change_colour():
    trv.set(trv.selection()[0],0,tags='changed_tag')        #this causes problem
    trv.tag_configure("changed_tag",foreground="blue",background="yellow")

When executed I get this error (from the first line of the function):
TypeError: set() got an unexpected keyword argument 'tags'

My goal is to change the tag of the selected item (in treeview), so it's colour will be changed.

the solution for this problem was provided in the post you linked; they had the same error — TheEagle, Jan 02 '21 at 20:13
I know, but I didn't quite understand it, an example of the solution would be very helpful to me. — Kleiton Kurti, Jan 02 '21 at 20:17

score 2 · Answer 1 · answered Jan 02 '21 at 21:25

2

I found a solution myself, for anyone with the same problem:

    def high_target():
        selected_item = trv.selection()[0]
        trv.item(selected_item, tags='changed_tag')
        trv.tag_configure("changed_tag",foreground="blue",background="yellow")

answered Jan 02 '21 at 21:25

Kleiton Kurti

153
8

You don't need to configure the tag here. Usually it's best to configure the tags at the time that you create the `Treeview` widget. – Bryan Oakley Jan 02 '21 at 21:56

score 0 · Answer 2 · answered Jan 02 '21 at 20:24

0

I think your code should be like this (didn't test it though):

def change_colour(iid):
    trv.item(iid, tags="changed_tag")
    trv.tag_configure("changed_tag", foreground="blue", background="yellow")

and where you create your treeview items with trv.insert, store the value returned by trv.insert in a variable and pass it as an argument to change_colour. Example:

iid = trv.insert("", "end", values=("a", "b", "c"))
change_colour(iid)

answered Jan 02 '21 at 20:24

TheEagle

5,808
3
11
39

Basically this changes the tag of every item. I don't want that, instead only the SELECTED item is what I want. – Kleiton Kurti Jan 02 '21 at 21:21
sorry @KleitonKurti : i misunderstood your question! – TheEagle Jan 02 '21 at 21:27

Modify the tag of the selected row in python tkinter treeview

2 Answers2