lxml之从 XML 中的 etree 的单个元素获取文本

下面的代码工作正常，但是没有任何 pythonic 方法来获得相同的功能吗？ 我只想解析 XML 并从多个元素(名称、name_status、url)中获取文本。

from lxml import etree 
from urllib2 import urlopen 
 
def ask_CoL(url): 
    tree = etree.parse(urlopen(url)) 
    tn=[ el.get('total_number_of_results') for el in tree.iter('results') ] 
    try: 
        nr = int(tn[0]) 
    except ValueError: 
        nr = 0 
    if nr == 1: 
        newstr = str([ el.text for el in tree.getiterator(tag='name')])\ 
                                             .strip("[]'")+','\ 
                +str([ el.text for el in tree.getiterator(tag='name_status')])\ 
                                             .strip("[]'")+','\ 
                +str([ el.text for el in tree.getiterator(tag='url')])\ 
                                             .strip("[]'")+'\n' 
    else: 
        newstr = 'NA\n' 
    return newstr 

示例 XML:

<results id="" name="Theragra chalcogramma" total_number_of_results="1" number_of_results_returned="1" start="0" error_message="" version="1.6 rev 1152"> 
  <result> 
    <id>9037795</id> 
    <name>Theragra chalcogramma</name> 
    <rank>Species</rank> 
    <name_status>accepted name</name_status> 
    <online_resource>http://www.fishbase.org/Summary/SpeciesSummary.php?ID=318</online_resource> 
    <source_database>FishBase</source_database> 
    <source_database_url>http://www.fishbase.org</source_database_url> 
    <name_html><i>Theragra chalcogramma</i> (Pallas, 1814)</name_html> 
    <url>http://www.catalogueoflife.org/col/details/species/id/9037795</url> 
  </result> 
</results> 

请您参考如下方法:

您可以简化接口(interface)和实现:

import urllib2 
from xml.etree import cElementTree as etree 
 
def f(url): 
    tree = etree.parse(urllib2.urlopen(url))          
    el = tree.find('results') 
    if el is not None: 
       lst = [el.findtext(tag) or '' for tag in "name name_status url".split()] 
       return ','.join(lst)