I discovered that in tkinter, '<KP_Down>','<KP_Up>', '<KP_Next>', '<KP_Prior>' does not scroll a ttk.Treeview widget as would '<KeyPress-Down>', '<KeyPress-Up>', '<KeyPress-Next>', '<KeyPress-Prior>' respectively would by default? The sample code below shows these behaviours.

How do I let '<KP_Down>' scroll the Treeview like how '<KeyPress-Next>' does? The same question applies to '<KP_Up>', '<KP_Next>', '<KP_Prior>' respective to '<KeyPress-Up>', '<KeyPress-Next>', '<KeyPress-Prior>'.

import random
import tkinter as tk
import tkinter.ttk as ttk


class App(ttk.Frame):

    def __init__(self, master, **kwargs):
        super().__init__(master, **kwargs)
        self.master = master
        self.tree = None
        self.ysb = None
        self.xsb = None
        self.create_widgets()
        self.create_bindings()

    def create_widgets(self):
        self.tree = ttk.Treeview(
            self.master, height=10, selectmode='extended', takefocus=True,
            columns=("x", "y", "z"), displaycolumns=["x", "y", "z"])
        self.tree.heading('#0', text="Points")
        self.tree.heading('x', text='X', anchor='center')
        self.tree.heading('y', text='Y', anchor='center')
        self.tree.heading('z', text='Z', anchor='center')
        self.tree.column('#0', stretch=True, width=100)
        self.tree.column('x', stretch=True, anchor='center', width=50)
        self.tree.column('y', stretch=True, anchor='center', width=50)
        self.tree.column('z', stretch=True, anchor='center', width=50)

        self.ysb = ttk.Scrollbar(
            self.master, orient='vertical', command=self.tree.yview)
        self.xsb = ttk.Scrollbar(
            self.master, orient='horizontal', command=self.tree.xview)
        self.tree.configure(
            yscrollcommand=self.ysb.set, xscrollcommand=self.xsb.set)

        self.columnconfigure(0, weight=1)
        self.rowconfigure(0, weight=1)
        self.tree.grid(row=0, column=0, sticky='nsew')
        self.ysb.grid(row=0, column=1, sticky='ns')
        self.grid(row=1, column=0, sticky='ew')

        groups = ["Local", "Remote"]
        for n, group in enumerate(groups):
            self.tree.insert(
                "", 'end', iid=f'G{n}', text=group, open=True)
            for i in range(10):
                self.tree.insert(
                    f'G{n}', 'end', iid=f'G{n}-D{i}',
                    text=f'G{n}-D{i}',
                    values=[
                        random.randrange(0, 20),
                        random.randrange(0, 20),
                        random.randrange(0, 20)
                    ]
                )

    def create_bindings(self):
        self.tree.bind('<KeyPress-Down>', self.kp_down)
        self.tree.bind('<KeyPress-Up>', self.kp_up)
        self.tree.bind('<KeyPress-Next>', self.kp_down)
        self.tree.bind('<KeyPress-Prior>', self.kp_up)
        self.tree.bind('<KP_Down>', self.kp_down)
        self.tree.bind('<KP_Up>', self.kp_up)
        self.tree.bind('<KP_Next>', self.kp_down)
        self.tree.bind('<KP_Prior>', self.kp_up)

    def kp_down(self, event):
        print(f"{event.keysym}")

    def kp_up(self, event):
        print(f"{event.keysym}")


if __name__ == '__main__':
    root = tk.Tk()
    app = App(root)
    root.columnconfigure(0, weight=1)
    root.rowconfigure(0, weight=1)
    app.grid(row=0, column=0, sticky='nsew')
    root.mainloop()