从 lxml.etree._Element 获取值

Question

具备以下条件：

from lxml import html
import io
from lxml import etree

parser = etree.HTMLParser() 
doc   = etree.parse(io.FileIO("index.html"), parser)
i=1

total = []

aa = doc.xpath(".//body/table[10]")
for x in aa:
    for j in x:
        for k in j:
            print type(k) #output is <type 'lxml.etree._Element'>
            print k.text

部分html文件：

http://pastebin.com/2eftj9qL

这将显示：

/Request_number_1
15
0
100.00%
1035 ms
923 ms
1407 ms
None


/Request_number_2
15
0
100.00%
966 ms
857 ms
1613 ms
None

如何迭代这个 lxml 元素？我想检索以毫秒为单位的第一个值（例如 average_time_array = [1035 ms, 966ms]）

Answer 1

使用这个 xpath 表达式怎么样？ .//body/table[1]/tr/td[5]

average_time_array = [td.text for td in doc.xpath(".//body/table[10]/tr/td[5]")]
print average_time_array