【问题标题】:Get the value of specific XML emements and add them to an array in Python获取特定 XML 元素的值并将它们添加到 Python 中的数组中
【发布时间】:2017-07-22 05:30:26
【问题描述】:

以下面的 XML 为例,我试图获取所有 <d:LayerXml> 标记的内容并将它们添加到数组中。为了解析 XML,我使用 ElementTree。

我第一次尝试使用那里的名称访问 XML 元素,但是这失败了,因为显然没有名为“条目”的元素 -

root = ET.fromstring(r.text)
for child in root:
    if child.tag == entry':
        print child.attirb

在我打印出所有子标签 (print child.tag) 后,我注意到每个标签都以 roor 元素中提供的 xmlns 为后缀。例如,“entry”实际上是“{http://www.w3.org/2005/Atom}”。

所以接下来我尝试使用该后缀访问元素,但它只是因为语法错误而失败。

root = ET.fromstring(r.text)
for child in root:
    if child.tag == '{http://www.w3.org/2005/Atom}entry':
        layerXML = child.{http://www.w3.org/2005/Atom}content
# Also tried - layerXML = child.'{http://www.w3.org/2005/Atom}content'
        print layerXML

鉴于以下 XML 示例,我如何将所有 <d:LayerXml> 元素的内容添加到数组中。澄清一下,在这种情况下,数组将包含 I want thisI want this, too

<?xml version="1.0" encoding="utf-8"?>
<feed xml:base="https://tablestore.somewhere.com/" xmlns="http://www.w3.org/2005/Atom" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns:georss="http://www.georss.org/georss" xmlns:gml="http://www.opengis.net/gml">
    <id>https://tablestore.somewhere.com/TableName</id>
    <title type="text">TableName</title>
    <updated>2017-03-02T12:01:04Z</updated>
    <link rel="self" title="TableName" href="TableName" />
    <entry m:etag="W/&quot;datetime'2017-03-02T11%3A46%3A37.1271167Z'&quot;">
        <id>https://tablestore.somewhere.com/TableName(PartitionKey='PartitonKey',RowKey='layer1-tileMatrixSet')</id>
        <category term="tablestore.TableName" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" />
        <link rel="edit" title="TableName" href="TableName(PartitionKey='PartitonKey',RowKey='layer1-tileMatrixSet')" />
        <title />
        <updated>2017-03-02T12:01:04Z</updated>
        <author>
            <name />
        </author>
        <content type="application/xml">
            <m:properties>
                <d:PartitionKey>PartitonKey</d:PartitionKey>
                <d:RowKey>RowKey</d:RowKey>
                <d:Timestamp m:type="Edm.DateTime">2017-03-02T11:46:37.1271167Z</d:Timestamp>
                <d:AuthType>basic</d:AuthType>
                <d:Credentials>CREDENTIALS1</d:Credentials>
                <d:Layer>layer1</d:Layer>
                <d:LayerXml>I want this</d:LayerXml>
                <d:Service>https://www.google.co.uk</d:Service>
                <d:TileMatrixSet>tileMatrixSet</d:TileMatrixSet>
            </m:properties>
        </content>
    </entry>
    <entry m:etag="W/&quot;datetime'2017-03-02T11%3A46%3A37.1271167Z'&quot;">
        <id>https://tablestore.somewhere.com/TableName(PartitionKey='PartitonKey',RowKey='layer2-tileMatrixSet')</id>
        <category term="tablestore.TableName" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" />
        <link rel="edit" title="TableName" href="TableName(PartitionKey='PartitonKey',RowKey='layer2-tileMatrixSet')" />
        <title />
        <updated>2017-03-02T12:01:04Z</updated>
        <author>
            <name />
        </author>
        <content type="application/xml">
            <m:properties>
                <d:PartitionKey>PartitonKey</d:PartitionKey>
                <d:RowKey>RowKey</d:RowKey>
                <d:Timestamp m:type="Edm.DateTime">2017-03-02T11:46:37.1271167Z</d:Timestamp>
                <d:AuthType>basic</d:AuthType>
                <d:Credentials>CREDENTIALS1</d:Credentials>
                <d:Layer>layer2</d:Layer>
                <d:LayerXml>I want this, too</d:LayerXml>
                <d:Service>https://www.google.co.uk</d:Service>
                <d:TileMatrixSet>tileMatrixSet</d:TileMatrixSet>
            </m:properties>
        </content>
    </entry>
</feed>

【问题讨论】:

    标签: python xml elementtree


    【解决方案1】:

    你还没有说你得到了哪个语法错误,下面给出了我想要的结果:

    from xml.etree import ElementTree as ET
    xml = '''<?xml version="1.0" encoding="utf-8"?>
    <feed xml:base="https://tablestore.somewhere.com/" xmlns="http://www.w3.org/2005/Atom" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns:georss="http://www.georss.org/georss" xmlns:gml="http://www.opengis.net/gml">
        <id>https://tablestore.somewhere.com/TableName</id>
        <title type="text">TableName</title>
        <updated>2017-03-02T12:01:04Z</updated>
        <link rel="self" title="TableName" href="TableName" />
        <entry m:etag="W/&quot;datetime'2017-03-02T11%3A46%3A37.1271167Z'&quot;">
            <id>https://tablestore.somewhere.com/TableName(PartitionKey='PartitonKey',RowKey='layer1-tileMatrixSet')</id>
            <category term="tablestore.TableName" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" />
            <link rel="edit" title="TableName" href="TableName(PartitionKey='PartitonKey',RowKey='layer1-tileMatrixSet')" />
            <title />
            <updated>2017-03-02T12:01:04Z</updated>
            <author>
                <name />
            </author>
            <content type="application/xml">
                <m:properties>
                    <d:PartitionKey>PartitonKey</d:PartitionKey>
                    <d:RowKey>RowKey</d:RowKey>
                    <d:Timestamp m:type="Edm.DateTime">2017-03-02T11:46:37.1271167Z</d:Timestamp>
                    <d:AuthType>basic</d:AuthType>
                    <d:Credentials>CREDENTIALS1</d:Credentials>
                    <d:Layer>layer1</d:Layer>
                    <d:LayerXml>I want this</d:LayerXml>
                    <d:Service>https://www.google.co.uk</d:Service>
                    <d:TileMatrixSet>tileMatrixSet</d:TileMatrixSet>
                </m:properties>
            </content>
        </entry>
        <entry m:etag="W/&quot;datetime'2017-03-02T11%3A46%3A37.1271167Z'&quot;">
            <id>https://tablestore.somewhere.com/TableName(PartitionKey='PartitonKey',RowKey='layer2-tileMatrixSet')</id>
            <category term="tablestore.TableName" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" />
            <link rel="edit" title="TableName" href="TableName(PartitionKey='PartitonKey',RowKey='layer2-tileMatrixSet')" />
            <title />
            <updated>2017-03-02T12:01:04Z</updated>
            <author>
                <name />
            </author>
            <content type="application/xml">
                <m:properties>
                    <d:PartitionKey>PartitonKey</d:PartitionKey>
                    <d:RowKey>RowKey</d:RowKey>
                    <d:Timestamp m:type="Edm.DateTime">2017-03-02T11:46:37.1271167Z</d:Timestamp>
                    <d:AuthType>basic</d:AuthType>
                    <d:Credentials>CREDENTIALS1</d:Credentials>
                    <d:Layer>layer2</d:Layer>
                    <d:LayerXml>I want this, too</d:LayerXml>
                    <d:Service>https://www.google.co.uk</d:Service>
                    <d:TileMatrixSet>tileMatrixSet</d:TileMatrixSet>
                </m:properties>
            </content>
        </entry>
    </feed>
    '''
    feed = ET.fromstring(xml)
    values = [value.text for value in feed.findall('{http://www.w3.org/2005/Atom}entry/{http://www.w3.org/2005/Atom}content/{http://schemas.microsoft.com/ado/2007/08/dataservices/metadata}properties/{http://schemas.microsoft.com/ado/2007/08/dataservices}LayerXml')]
    print(values)
    

    其实好像也可以用

    values = [value.text for value in feed.findall('.//{http://schemas.microsoft.com/ado/2007/08/dataservices}LayerXml')]
    

    values = [value.text for value in feed.findall('.//d:LayerXml', { 'd' : 'http://schemas.microsoft.com/ado/2007/08/dataservices' })]
    

    如果您不想列出完整路径。

    【讨论】:

    • 谢谢你,这似乎在做这项工作。仅供参考,我看到的语法错误字面意思是“SyntaxError:无效语法”,并指向大括号。再次感谢。
    猜你喜欢
    • 1970-01-01
    • 2016-08-18
    • 1970-01-01
    • 1970-01-01
    • 2020-05-15
    • 1970-01-01
    • 1970-01-01
    • 2020-08-16
    • 1970-01-01
    相关资源
    最近更新 更多