《Python编程快速上手-让繁琐工作自动化》这本书第四章的字符图网格练习。
结果要求长这样：
..OO.OO..
.OOOOOOO.
.OOOOOOO.
..OOOOO..
...OOO...
....O....
俺写成这样：
grid = [[‘.‘, ‘.‘, ‘.‘, ‘.‘, ‘.‘, ‘.‘], [‘.‘, ‘O‘, ‘O‘, ‘.‘, ‘.‘, ‘.‘], [‘O‘, ‘O‘, ‘O‘, ‘O‘, ‘.‘, ‘.‘], [‘O‘, ‘O‘, ‘O‘, ‘O‘, ‘O‘, ‘.‘], [‘.‘, ‘O‘, ‘O‘, ‘O‘, ‘O‘, ‘O‘], [‘O‘, ‘O‘, ‘O‘, ‘O‘, ‘O‘, ‘.‘], [‘O‘, ‘O‘, ‘O‘, ‘O‘, ‘.‘, ‘.‘], [‘.‘, ‘O‘, ‘O‘, ‘.‘, ‘.‘, ‘.‘], [‘.‘, ‘.‘, ‘.‘, ‘.‘, ‘.‘, ‘.‘]] for a in range(len(grid[0])): for i in grid: print(i[a],end=‘‘) print(‘‘)
感觉循环嵌套在以后会很常用。
原文：https://www.cnblogs.com/freshGarden/p/12017822.html