我是Python的新手,因此提前道歉!我试图从一个函数返回两个列表,其中while循环读取一个xml文件。我无法弄清楚该怎么做。我指的是下面代码中的imres(整数)和subres(2个整数),在循环中找到~10次。 Debuging显示变量在循环中正确填充,但我不知道如何返回填充列表,而是获取空列表。谢谢。
def getresolution(node):
imres = []
subres = []
child4 = node.firstChild
while child4:
...
for child8 in keepElementNodes(child7.childNodes):
if child8.getAttribute('Hash:key') == 'ImageSize':
X = float(child8.getElementsByTagName('Size:width')[0].firstChild.data)
Y = float(child8.getElementsByTagName('Size:height')[0].firstChild.data)
imres += [[X, Y]]
if child8.getAttribute('Hash:key') == 'Resolution':
subres += [int(child8.firstChild.data)]
getresolution(child4)
child4 = child4.nextSibling
return [imres, subres]
[imres, subres] = getresolution(xml_file)
未经测试,但这应该指向正确的方向:
def getresolution(node):
imres = []
subres = []
child4 = node.firstChild
while child4:
...
for child8 in keepElementNodes(child7.childNodes):
if child8.getAttribute('Hash:key') == 'ImageSize':
X = float(child8.getElementsByTagName('Size:width')[0].firstChild.data)
Y = float(child8.getElementsByTagName('Size:height')[0].firstChild.data)
imres += [[X, Y]]
if child8.getAttribute('Hash:key') == 'Resolution':
subres += [int(child8.firstChild.data)]
t_imres, t_subres = getresolution(child4)
imres += t_imres
subres += t_subres
child4 = child4.nextSibling
return [imres, subres]
[imres, subres] = getresolution(xml_file)