<p>添加<code>return</code>语句以获取所需的值:</p>
<pre><code>def loescheeinzelgaenger(removemap, addmap):
toberemoved = [] #lists all the list values which should be removed from the removemap and added to the addmap
for row in range(shape[0]):
for column in range(shape[1]):
if (row,column) in removemap:
# define 4 neighbours
n1 = (row - 1, column)
n2 = (row, column - 1)
n3 = (row + 1, column)
n4 = (row, column + 1)
if intersection([n1,n2,n3,n4],removemap) == []:
toberemoved.append((row, column))
addmap.append((row, column))
elif intersection([n1,n2,n3],removemap) == []:
toberemoved.append((row, column))
addmap.append((row, column))
elif intersection([n2,n3,n4],removemap) == []:
toberemoved.append((row, column))
addmap.append((row, column))
elif intersection([n1, n3,n4],removemap) == []:
toberemoved.append((row, column))
addmap.append((row, column))
elif intersection([n1,n2,n4],removemap) == []:
toberemoved.append((row, column))
addmap.append((row, column))
removemap = [x for x in removemap if x not in toberemoved]
print(removemap) #it's changed here
return removemap, addmap
waterMap,grassMap = loescheeinzelgaenger(waterMap,grassMap)
</code></pre>
<p>你基本上是在告诉Python:在这个函数中所做的所有事情中,我希望你给我这两个变量在函数末尾的状态</p>