python QtWebkit：nextSibing不返回null或無

Question

下面是我用來獲取給定節點的所有子節點列表的代碼片段。但nextSibling（）永遠不會返回null，所以while循環將永遠執行。請幫忙。

children = [ ] 
children.append(documentElement.firstChild()) 
curr_node = children[0] 
while curr_node.nextSibling(): 
    print curr_node, len(children) 
    children.append(curr_node.nextSibling()) 
    curr_node = curr_node.nextSibling() 

Answer 1

據我瞭解nextSibling將始終返回QWebElement，但是你可以檢查是否正在使用ISNULL（）null元素

while not curr_node.nextSibling().isNull(): 
    print curr_node, len(children) 
    children.append(curr_node.nextSibling()) 
    curr_node = curr_node.nextSibling() 

您可以檢查在http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qwebelement.html#isNull HTTP：// WWW .riverbankcomputing.co.uk/static/Docs/PyQt4/html/qwebelement.html＃nextSibling