第一个situation：tag内有link

from lxml import etree 

node = etree.fromstring('<a xml = 'www.www.com'><c>bum</c></a>')

print node.findtext('c',default = 'what happened?')

第二个situation：所求text所在tag上一级tag无content

from lxml import etree 

node = etree.fromstring('<a><b><c>bum</c></b></a>')

print node.findtext('c', default = 'what happened?')

以上两个situation所返回的结果都是‘None’

成功的situation

from lxml import etree 

node = etree.fromstring('<a><c>bum</c></a>')

print node.findtext('c')

想问一下这两个问题应该怎么解决？