CODEWITHSUNDEEP
pythontkinterlistboxpython-3.4
feners
feners

Reputation: 675

Removing a selection from a listbox, as well as remove it from the list that provides it

How can I use the following code to delete a selection from a listbox and removing it from the list the contains it also? The selections in the listbox are dictionaries which I store in a list.

.................code..............................
self.frame_verDatabase = Listbox(master, selectmode = EXTENDED)
        self.frame_verDatabase.bind("<<ListboxSelect>>", self.OnDouble)
        self.frame_verDatabase.insert(END, *Database.xoomDatabase) 
        self.frame_verDatabase.pack()

        self.frame_verDatabase.config(height = 70, width = 150)

    def OnDouble(self, event):
        widget = event.widget
        selection=widget.curselection()
        value = widget.get(selection[0])
        print ("selection:", selection, ": '%s'" % value)

Example: When I make a selection in the listbox, this data gets returned:

selection: (2,) : '{'Fecha de Entrega': '', 'Num Tel/Cel': 'test3', 'Nombre': 'test3', 'Num Orden': '3', 'Orden Creada:': ' Tuesday, June 23, 2015', 'Email': 'test3'}'

Upvotes: 4

Views: 15518

Answers (1)

maccartm
maccartm

Reputation: 2105

from tkinter import *
things = [{"dictionaryItem":"value"}, {"anotherDict":"itsValue"}, 3, "foo", ["bar", "baz"]]
root = Tk()
f = Frame(root).pack()
l = Listbox(root)
b = Button(root, text = "delete selection", command = lambda: delete(l))
b.pack()
l.pack()

for i in range(5):
    l.insert(END, things[i])

def delete(listbox):

    global things
    # Delete from Listbox
    selection = l.curselection()
    l.delete(selection[0])
    # Delete from list that provided it
    value = eval(l.get(selection[0]))
    ind = things.index(value)
    del(things[ind])
    print(things)

root.mainloop()

Edited for clarity. Since the listbox in this case only included dict objects I simply eval the value that is pulled from the listbox, get its index inside the list object, and delete it.

Everything from the second comment up to the print statement can be accomplished in one line as follows:

del(things[things.index(eval(l.get(selection[0])))])

If you feel like being creative.

Upvotes: 5

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