让PanedWindow分隔符“捕捉”到特定的位置，而不是仅仅允许用户选择任意的位置

paned_window = PanedWindow(parent)

child1 = Frame(paned_window)
child2 = Frame(paned_window)

paned_window.add(child1)
paned_window.add(child2)

paned_window.sash_place(index, position)

paned_window.sash_configure(index, width=size)

from tkinter import Tk, PanedWindow, Frame

def set_sash_position():
    paned_window.sash_place(0, 200)  # 将第一个分隔符放置在位置200

root = Tk()

paned_window = PanedWindow(root)
child1 = Frame(paned_window, bg='red', width=200, height=200)
child2 = Frame(paned_window, bg='blue', width=200, height=200)
paned_window.add(child1)
paned_window.add(child2)
paned_window.pack()

set_sash_position()

root.mainloop()