新建label与button，并设置位置（grid）
import tkinter as tk
root = tk.Tk()
label = tk.Label(root, text = ‘Label')
label.grid(column = 3, row = 8)
button = tk.Button(root, text = ‘Button')
button.grid(column = 5, row = 1)
按钮间距设置
col_count, row_count = root.grid_size()
for col in xrange(col_count):
root.grid_c
