from lxml import etree
# 获取本地文件
tree = etree.parse('bendi.html')
print(tree)
# /表示子元素，//表示子孙后代元素
li = tree.xpath('//body/ul/li')
print(li)
print(len(li))
# 获取有id的li
liid = tree.xpath('//body/ul/li[@id]/text()')
for i in liid:
print(i)
# 获取id为bj的li
libj = tree.xpath('//body/ul/li[@id="bj"]/text()')
print(libj)