python - How to refresh tkinter entry value? I get a 1-click lag -

i built interface user fills hierarchical form. past values displayed in ttk.treeview. allow user edit previous values clicking on tree. value gets filled on form can edited , overwriten.

the problem: value insert on entry widget displayed next time user clicks it, 1 click lagging. please run sample code better understanding. gets confusing because if user clicks value , another, display clicked value.

it must have event handling routine in tkinter, not find , answer. how can rid of lag?

import tkinter tk tkinter import ttk   root = tk.tk()  def cb_clique(event):     item = tree.selection()[0]     entry1.delete(0, "end")     entry1.insert(0, item)  entry1 = tk.entry(root, width=15) entry1.grid(row=1,column=1)  tree = ttk.treeview(root) tree.bind("<button-1>", cb_clique) tree["columns"]=("valor") tree.column("valor", width=200 ) tree.heading("valor", text="valor") tree.grid(row=3, column = 1, columnspan = 4) tree.insert("", "end", iid = "will display position",text = "click me",            values=("a","b")) tree.insert("", "end", iid = "use position info",            text = "click me", values=("a","b"))  root.mainloop() 

looks <button-1> event triggers before window notices selection has changed, selection() returns thing selected before click. try changing event binding <<treeviewselect>>.

tree.bind("<<treeviewselect>>", cb_clique)