Python：如何打印出格式化为网格的二维列表？
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Python: how to print out a 2d list that is formatted into a grid?
提问by user3225528
Currently, I have made this code
目前，我已经制作了这段代码
def grid_maker(h,w):
grid = [[["-"] for i in range(w)] for i in range(h)]
grid[0][0] = ["o"]
print grid
>>>grid_maker(3,5) => [[['o'], ['-'], ['-'], ['-'], ['-']], [['-'], ['-'], ['-'], ['-'], ['-']], [['-'], ['-'], ['-'], ['-'], ['-']]]
I want to make another function that will take in the produced 2d array and print it out such that it is in this format:
我想制作另一个函数，它将接收生成的二维数组并将其打印出来，使其采用以下格式：
o----
-----
-----
However, I am unsure where to start.
但是，我不确定从哪里开始。
回答by m.wasowski
Use string join()
使用字符串 join()
for row in grid:
print ''.join(*zip(*row))
or as one-liner:
或作为单线：
print '\n'.join(''.join(*zip(*row)) for row in grid)
but if would rather recommend you to change everything into:
但如果宁愿建议您将所有内容更改为：
def grid_maker(h,w):
grid = [["-" for _ in range(w)] for _ in range(h)]
grid[0][0] = "o"
return grid
print '\n'.join(''.join(row) for row in grid_maker(5,5))
回答by Christian
If you want to use the result of grid_maker(), you have to return its result, using return:
如果要使用 的结果grid_maker()，则必须使用 返回其结果return：
def grid_maker(h, w):
grid = [["-" for i in range(w)] for i in range(h)]
grid[0][0] = "o"
return grid
I modified it, because I don't think that each element must be inside another list.
我修改了它，因为我不认为每个元素都必须在另一个list.
To print the "grid", you could iterate through each rowand then iterate through each element:
要打印“网格”，您可以遍历每一行，然后遍历每个元素：
def print_grid(grid):
for row in grid:
for e in row:
print e,
print
Output:
输出：
print_grid(grid_maker(3, 5))
o - - - -
- - - - -
- - - - -
回答by anana
If you want to "pretty" print your grid with each sublist on its own line, you can use pprint:
如果您想在自己的行上“漂亮”地打印每个子列表的网格，您可以使用pprint：
>>> grid=[[['o'], ['-'], ['-'], ['-'], ['-']], [['-'], ['-'], ['-'], ['-'], ['-']], [['-'], ['-'], ['-'], ['-'], ['-']]]
>>> from pprint import pprint
>>> pprint(grid)
[[['o'], ['-'], ['-'], ['-'], ['-']],
[['-'], ['-'], ['-'], ['-'], ['-']],
[['-'], ['-'], ['-'], ['-'], ['-']]]
It will still show each element as a list, as you defined it, if you want to show them as strings you'll have to use joins like m.wasowski suggests.
它仍然会将每个元素显示为一个列表，正如您定义的那样，如果您想将它们显示为字符串，则必须使用 m.wasowski 建议的连接。
