Question

此代码用于汇总此xml文档中的注释计数。

import urllib
import xml.etree.ElementTree as ET

url = 'http://python-data.dr-chuck.net/comments_42.xml'

print 'Retrieving', url
uh = urllib.urlopen(url)
data = uh.read()
print 'Retrieved',len(data),'characters'
print data
for line in data:
    tree = ET.fromstring(data)
    comments = tree.findall('comments')

    name = comments[0].find('comment').find('name').text
    count = comments[0].find('comment').find('count').text
    count = int(count)
    count = count + count
print count

但它只显示第一个comment标记上的评论数量，然后将其添加到自身然后停止。

这是输出。顶部是xml文档，底部是计数（ 194 ， 97 + 97 ，只有 Romina的评论< / strong>），这是不正确的。它应该是文件中所有注释的总和，而不仅仅是Romina的

如何获取文件中所有注释的总和？

Retrieving http://python-data.dr-chuck.net/comments_42.xml Retrieved 4189 characters <?xml version="1.0" encoding="UTF-8"?> <commentinfo> <note>This file contains the sample data for testing</note> <comments> <comment> <name>Romina</name> <count>97</count> </comment> <comment> <name>Laurie</name> <count>97</count> </comment> <comment> <name>Bayli</name> <count>90</count> </comment> <comment> <name>Siyona</name> <count>90</count> </comment> <comment> <name>Taisha</name> <count>88</count> </comment> <comment> <name>Ameelia</name> <count>87</count> </comment> <comment> <name>Alanda</name> <count>87</count> </comment> <comment> <name>Prasheeta</name> <count>80</count> </comment> </commentinfo> 194

Answer 1

请注意细微的变化。由于<comments>包含多个<comment>标记，因此我们首先需要查找所有标记，然后我们才能迭代它们并找到<count>标记。

import urllib
import xml.etree.ElementTree as ET

url = 'http://python-data.dr-chuck.net/comments_42.xml'

uh = urllib.urlopen(url)
data = uh.read()

tree = ET.fromstring(data)
comments = tree.find('comments').findall('comment')
total_count = 0
for comment in comments:
    count = comment.find('count').text
    count = int(count)
    total_count += count
print total_count
>> 2553

Answer 2

您的循环逻辑错误。而不是

for line in data:
    tree = ET.fromstring(data)
    comments = tree.findall('comments')


    name = comments[0].find('comment').find('name').text
    count = comments[0].find('comment').find('count').text
    count = int(count)
    count = count + count

你需要

tree = ET.fromstring(data)
comments = tree.find('comments').findall('comment')

count = 0
for comment in comments:
    name = comment.find('name').text
    count += int(comment.find('count').text)

求和所有xml标记值？

2 个答案: