[英]scan list of lists in python finding specific characters on elements
I've got a problem with find a way for visit a particular list of list in python.我在寻找访问 python 中特定列表的方法时遇到了问题。
this is the situation:这是这种情况:
I've got a list of list like this with some 1 and some 0:我有一个这样的列表列表,其中包含一些 1 和一些 0:
matrix =
[
[0,0,0,0,0,0,0],
[0,1,1,1,1,0,1],
[0,1,1,1,1,0,1],
[0,1,1,1,1,0,1],
[0,0,0,0,0,0,0],
]
so I enter in the list of list in a specific coordinate like this所以我在这样的特定坐标中输入列表列表
y = 3
x = 3
and from this position I need to mark (example with a 2) all the coordinates near of the start position where 1 is in the box.从这个 position 我需要标记(例如 2)开始 position 附近的所有坐标,其中 1 在框中。 Stop when I've marked all the positions close of the starting point with 2.
当我用 2 标记所有接近起点的位置时停止。
This is the expected result:这是预期的结果:
expected_matrix =
[
[0,0,0,0,0,0,0],
[0,2,2,2,2,0,1],
[0,2,2,2,2,0,1],
[0,2,2,2,2,0,1],
[0,0,0,0,0,0,1],
]
Edit: I can't scan all the lists, because I'm not interested to mark every 1 but only the closest (alongside of a 0 inside the starting point coordinates (rows ad cols)) of the starting point编辑:我无法扫描所有列表,因为我不想标记每个 1,而只标记起点最接近的(与起点坐标内的 0 一起(行广告列))
Thanks.谢谢。
since your description is not clear, so I just make some assumptions here:由于您的描述不清楚,所以我在这里做一些假设:
path
it will mark all 1
to become 2
.path
它会将所有1
标记为2
。 Based on these assumptions, the problem can be solve this way:matrix =[
[0,0,0,0,0,0],
[0,1,1,1,1,0],
[0,1,1,1,1,0], # ???
[0,1,1,1,1,1], # <- 3, 3?
[0,0,0,0,1,1],
]
R = len(matrix) # 5
C = len(matrix[0]) # 6
start_r, start_c = 3, 3
for i in range(start_r, R):
for j in range(start_c, C):
#print(i, j, matrix[i][j]) #can comment out
matrix[i][j] = 2 # mark it to 2
print(matrix)
ok, finally I've found a solution.好的,我终于找到了解决方案。
#upside
for yy in range(y,-1,-1):
if matrix[yy][x] == 0:
break
for xx in range(x,-1,-1):
if matrix[yy][xx] == 0:
break
matrix[yy][xx] = 2
for xx in range(x+1, len(matrix[y])):
if matrix[yy][xx] == 0:
break
matrix[yy][xx] = 2
#downside
for yy in range(y, len(matrix)):
if matrix[yy][x] == 0:
break
for xx in range(x,-1,-1):
if matrix[yy][xx] == 0:
break
matrix[yy][xx] = 2
for xx in range(x+1, len(matrix[y])):
if matrix[yy][xx] == 0:
break
matrix[yy][xx] = 2
maybe could be a recursive solution but this could help me anyway!也许可能是一个递归解决方案,但这无论如何都可以帮助我!
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.