XML 计数和打印元素

发布于 2025-01-18 02:46:45 字数 1330 浏览 1 评论 0 原文

<?xml version="1.0" encoding="utf-8"?>
<export_full date="2022-03-15 07:01:30" version="20160107">
    <items>
        <item code="A1005" image="https://www.astramodel.cz/images/A/800x600/A1005.jpg" imageDate="2014-04-08" name="Uhlíková tyčka 0.6mm (1m)" brandId="32" brand="ASTRA" czk="89.00" eur="3.50" czksmap="89.00" eursmap="3.50" hasPrice="true" created="2014-01-09" changed="" new="false" stock="true" date="" stock2="true" date2="" stock3="high" date3="" discontinued="false" weight="0.001" length="0.001" width="0.001" height="1.000" recycling_fee="">
            <descriptions>
                <description title="Charakteristika" order="1">&lt;p&gt;Tyč z uhlíkových vláken kruhového průřezu ø0.6&amp;nbsp;mm v délce 1&amp;nbsp;m. Hmotnost 0,3&amp;nbsp;g&lt;/p&gt;</description>
            </descriptions>
        </item>

我有一个 XML 文件，该文件非常大，但是我正在尝试计算项目总数并尝试输入每个项目的名称属性，在上面您可以看到每个项目及其标签的外观。我确实得到了尝试打印总项目数时出现一个数字，但是我不确定我是否以正确的方式进行操作，并且就名称属性而言，到目前为止我什么也没得到，请帮助。

import xml.etree.ElementTree as ET

tree = ET.parse('export_full.xml')
root = tree.getroot()
test = [elem.tag for elem in root.iter("item")]
print(len(test))

for item in root.iter('./item[@name]'):
    print(item.attrib)

原文

<?xml version="1.0" encoding="utf-8"?>
<export_full date="2022-03-15 07:01:30" version="20160107">
    <items>
        <item code="A1005" image="https://www.astramodel.cz/images/A/800x600/A1005.jpg" imageDate="2014-04-08" name="Uhlíková tyčka 0.6mm (1m)" brandId="32" brand="ASTRA" czk="89.00" eur="3.50" czksmap="89.00" eursmap="3.50" hasPrice="true" created="2014-01-09" changed="" new="false" stock="true" date="" stock2="true" date2="" stock3="high" date3="" discontinued="false" weight="0.001" length="0.001" width="0.001" height="1.000" recycling_fee="">
            <descriptions>
                <description title="Charakteristika" order="1"><p>Tyč z uhlíkových vláken kruhového průřezu ø0.6&nbsp;mm v délce 1&nbsp;m. Hmotnost 0,3&nbsp;g</p></description>
            </descriptions>
        </item>

I have a an XML file which is significantly large however I am trying to count the total number of items and try to type the name attribute of each item, above you can see of how each individual item with its tags looks like.I do get a number when trying to print the total item count however I'm not sure if I'm going about it the right way and in terms of name attributes I am getting nothing so far, please help.

import xml.etree.ElementTree as ET

tree = ET.parse('export_full.xml')
root = tree.getroot()
test = [elem.tag for elem in root.iter("item")]
print(len(test))

for item in root.iter('./item[@name]'):
    print(item.attrib)

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浮萍、无处依 2025-01-25 02:46:45

评估Xpath表达式使用函数。请注意，“项目”元素是“项目”元素的孩子，因此，如果使用绝对路径，则需要将'项目'添加到XPath中，否则使用“ .//item [@name]”。

for item in root.findall('./items/item[@name]'):
    print(item.attrib)

如果您希望它迭代所有项目，并将名称属性添加到列表中。

items = [elem.get('name') for elem in root.iter("item")]
print(len(items), items)  # print count of items and list of names

如果XML很大，那么您可以使用 iterparse（）函数。

下面的示例迭代XML，如果标签为“项目”，则打印其“名称”属性。您可以添加要检查的任何逻辑。

count = 0
for _, elem in ET.iterparse('export_full.xml'):
    if elem.tag == 'item':
        print(elem.get('name')) # print out just the name
        count += 1
        # print(elem.attrib) # print out all attributes
print(count) # display number of items

To evaluate an XPath expression use findall() function. Note the "item" elements are children of "items" element so need to add 'items' to the XPath if using an absolute path otherwise use ".//item[@name]".

for item in root.findall('./items/item[@name]'):
    print(item.attrib)

If you want it iterate over all items and add the name attribute to a list.

items = [elem.get('name') for elem in root.iter("item")]
print(len(items), items)  # print count of items and list of names

If XML is huge then you can benefit by doing an incremental parse of the XML using iterparse() function.

Example below iterate overs the XML and if tag is 'item' then print its 'name' attribute. You can add whatever logic you want to check.

count = 0
for _, elem in ET.iterparse('export_full.xml'):
    if elem.tag == 'item':
        print(elem.get('name')) # print out just the name
        count += 1
        # print(elem.attrib) # print out all attributes
print(count) # display number of items

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