button - Dynamicaly deleting widgets in Tkinter in Python -


i have widgets in tkinter frame want remove on users click. there labels , each label, there corresponding button remove it. here code making frame.

      def delfav():         win2 = tk()         widgets = []         url in urls:             label = label(win2, text = url)             button = button(win2, text = "delete")             widgets.append({"url" : url, "label" : label, "button" : button})         w in widgets:             print w["url"], w["label"], w["button"]             w["button"].configure(command = lambda : delete(w["url"], widgets))             w["label"].pack()             w["button"].pack()

the delete function looks this:

      def delete(url, widgets):         w in widgets:             if w["url"] == url:                 print w["label"]                 print w["button"]                 w["label"].pack_forget()                 w["button"].pack_forget()                 return

when want delete url press associated button, last button removed. eg, output generated clicking 2nd delete button, out of 3 buttons.

      entry/13394 .44877224 .44877384     entry/13277 .44877464 .44877544     entry/8166 .44877624 .44877704     .44877624     .44877704

the first 3 lines show widgets list, , on clicking middle button, last button , label names printed delete function last 2 lines.

any button click, last label , button disappear. how correct ?

this old "late binding on functions declared in loop" problem.

w["button"].configure(command = lambda : delete(w["url"], widgets))

on line, command delete(w["url"], widgets) assumes w has final value w had when loop finished, rather value had when called configure. clicking button deletes last label.

you can compel lambda "bind earlier" passing w default argument.

w["button"].configure(command = lambda w=w: delete(w["url"], widgets))

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