Python: Character Picture Grid

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本文介绍了一个使用Python编程语言处理字符网格的方法。通过遍历二维列表的元素并按特定顺序打印，可以将字符网格转换为可视化的图像。示例代码演示了如何通过调整循环顺序来改变输出图像的方向。

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学习《Python编程快速上手》P79

问题链接：https://automatetheboringstuff.com/chapter4/

Say you have a list of lists where each value in the inner lists is a one-character string, like this:

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', '.', '.', '.'],
        ['.', '.', '.', '.', '.', '.']]

You can think of grid[x][y] as being the character at the x- and y-coordinates of a “picture” drawn with text characters. The (0, 0) origin will be in the upper-left corner, the x-coordinates increase going right, and the y-coordinates increase going down.

Copy the previous grid value, and write code that uses it to print the image.

..OO.OO..
.OOOOOOO.
.OOOOOOO.
..OOOOO..
...OOO...
....O....

代码实现：

# Problem: Character Picture Grid
# The url of the problem: https://automatetheboringstuff.com/chapter4/

grid = [['.','.','.','.','.','.'],
        ['.','0','0','.','.','.'],
        ['0','0','0','0','.','.'],
        ['0','0','0','0','0','.'],
        ['.','0','0','0','0','0'],
        ['0','0','0','0','0','.'],
        ['0','0','0','0','.','.'],
        ['.','0','0','.','.','.'],  
        ['.','.','.','.','.','.']] 
        
for j in range(len(grid[0])):
    for i in range(len(grid)):
        print(grid[i][j],end='')
    print('\r')