python treeview 的問題

Question

我在 column 上設置 "stretch = False", 讓他不能調寬度, 但是沒有作用, 有人知道為什麼嗎?

以下是我的代碼

from tkinter import *
from tkinter import ttk

def main():
    gMaster = Tk()
    w = ttk.Treeview(gMaster, show="headings", columns=('Column1', 'Column2'))
    w.heading('#1', text='Column1', anchor=W)
    w.heading('#2', text='Column2', anchor=W)
    
    w.column('#1', minwidth = 70, width = 70, stretch = False)
    w.column('#2', minwidth = 70, width = 70, stretch = False)
    w.grid(row = 0, column = 0)
    mainloop()

if __name__ == "__main__":    
    main()