python - 如何通过 Elementtree 检查属性是否存在？

Question

我需要检查某些属性是否存在。喜欢：

if "blah-blah-blah" is None:
    print "there is no such attribute"
else:
    print "The attribute exists"

Answer 1

Elementattrib对象具有字典中的所有属性。

if 'blah' not in elem.attrib:
   print "there is no such attribute"