tkinter resizable text with grid

[Paulo da Silva]

Hi!

Does anybody know why this code does not expand the text widget when I
increase the window size (with mouse)? I want height and width but as
minimum (or may be initial) size.

import tkinter as tk

class App:
	def __init__(self,master):
		self.tboard=tk.Text(master,height=40,width=50)
		self.tboard.grid(row=1,column=1,sticky="nsew")
		self.tboard.grid_rowconfigure(1,weight=1)
		self.tboard.grid_columnconfigure(1,weight=1)

root=tk.Tk()
app=App(root)

root.mainloop()

Thanks