通过KeyE迭代python中的xml

Question

我的Xml:

<books>
<book name="goodbook" cost="10" color="green"></book>
<book name="badbook" cost="1000" weight="100"></book>
<book name="avgbook" cost="99" weight="120"></book>
</books>

我的python代码：-

^{pr2}$

我得到的错误是：

python books.py 
Traceback (most recent call last):
  File "books.py", line 10, in <module>
    weight              = child.attrib['weight'] #KeyError
KeyError: 'weight'

weight和color正在通过keyrerror，因为在遍历循环“color”和“weight”属性时，在所有行中都找不到。我需要我的输出应该与输入xml相同：（。 如何跳过此错误并使其与输入xml相同。提前谢谢。在

Answer 1

for child in root:
    name                = child.attrib['name']
    cost                = child.attrib['cost']
    # create "book" here
    book    = ET.SubElement(root_new, "book") 
    book.set("name",name)               
    book.set("cost",cost) 
    if 'color' in child.attrib:
        color               = child.attrib['color']
        book.set("color",color) 
    if 'weight' in child.attrib:
        weight              = child.attrib['weight']
        book.set("weight",weight)