我如何在python中制作网格？
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How do i make a grid in python?
提问by SollyBunny
This is my code
这是我的代码
width = int(input("How wide?"))
height = int(input("How high?"))
grid = []
row = []
bak = "."
for i in range(width):
row.append(bak)
for i in range(height):
grid.append(row)
while True:
for i in range(len(grid)):
print(grid[i])
It's not working and i don't know why. This is what i get when i put 5 width and 5 height:
它不起作用，我不知道为什么。这就是我放置 5 个宽度和 5 个高度时得到的结果：
['.', '.', '.', '.', '.']
['.', '.', '.', '.', '.']
['.', '.', '.', '.', '.']
['.', '.', '.', '.', '.']
['.', '.', '.', '.', '.']
That's fine and all but when i change the bottom left dot by using this: grid[0][0] = "a". This happens:
这很好，但是当我使用以下命令更改左下角的点时：grid[0][0] = "a"。有时候是这样的：
['a', '.', '.', '.', '.']
['a', '.', '.', '.', '.']
['a', '.', '.', '.', '.']
['a', '.', '.', '.', '.']
['a', '.', '.', '.', '.']
It thinks the "row" list is a tag when it's clearly coded not to be Please help me on how to fix this problem
它认为“行”列表是一个标签，当它被清楚地编码为不是请帮助我解决这个问题
采纳答案by SollyBunny
Use list()
使用列表（）
gridline = []
for i in range(5):
gridline.append("")
grid = []
for i in range(5):
grid.append(list(gridline))
回答by DeepSpace
for i in range(height):
grid.append(row)
This forloop appends the same rowlist to the gridlist (actually it appends 5 different references to the samelist).
这个for循环将相同的row列表附加到grid列表中（实际上它向同一个列表附加了 5 个不同的引用）。
Instead, you should append a new, different list:
相反，您应该附加一个新的、不同的列表：
for i in range(height):
grid.append([])
Verify by viewing the memory addresses of the inner lists in these 2 examples:
通过查看以下 2 个示例中的内部列表的内存地址进行验证：
grid = []
row = []
for i in range(5):
grid.append(row)
for li in grid:
print(id(li))
# 92532104
# 92532104
# 92532104
# 92532104
# 92532104
compared to
相比
grid = []
for i in range(5):
grid.append([])
for li in grid:
print(id(li))
# 80801224
# 80801160
# 80669704
# 80381192
# 80380488
回答by Trigger-Me-Elmo
Just use this.
就用这个。
width = int(input("how wide "))
height = int(input("how tall "))
grid = []
i = int(0)
for i in range(width):
grid.append("_")
for i in range(height):
print(grid)
