我正在尝试从 LabVIEW 架构创建一个 pyxb 模块。使用模块我得到一个 UnrecognizedDOMRootNodeError:
Traceback (most recent call last): File "X:\Projects\LV-PY\Python\LV-PY\pyXB\testXML.py", line 14, in <module> fc_return = cluster.CreateFromDOM(doc.documentElement) File "X:\Projects\LV-PY\Python\LV-PY\pyXB\cluster.py", line 76, in CreateFromDOM return pyxb.binding.basis.element.AnyCreateFromDOM(node, default_namespace) File "C:\Python27\lib\site-packages\pyxb\binding\basis.py", line 1743, in AnyCreateFromDOM return cls.CreateDOMBinding(node, expanded_name.elementBinding(), _fallback_namespace=fallback_namespace) File "C:\Python27\lib\site-packages\pyxb\binding\basis.py", line 1705, in CreateDOMBinding raise pyxb.UnrecognizedDOMRootNodeError(node) pyxb.exceptions_.UnrecognizedDOMRootNodeError: <pyxb.utils.saxdom.Element object at 0x0625F9D0>
由于 LabVIEW 架构很大,我只用一个包含字符串的集群制作了一个小样本:
<xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:lv="http://www.ni.com/labview" elementFormDefault="qualified"
targetNamespace="http://www.ni.com/labview"
xmlns="http://www.ni.com/labview">
<!--Root element that contains all other data-->
<!--will NOT be produced by primitive-->
<xsd:element name="LVData" type="lv:LVDataRootType"/>
<xsd:complexType name="LVDataRootType">
<xsd:choice minOccurs="0" maxOccurs="unbounded">
<xsd:element name="Cluster" type="lv:ClusterType"/>
<xsd:element name="String" type="lv:StringType"/>
</xsd:choice>
</xsd:complexType>
<!--Basic elements-->
<xsd:complexType name="StringType">
<xsd:complexContent>
<xsd:extension base="lv:LVDataType"/>
</xsd:complexContent>
</xsd:complexType>
<xsd:complexType name="LVDataType">
<xsd:sequence>
<xsd:element name="Name" type="xsd:string" minOccurs="1"/>
<xsd:element name="Val" type="xsd:string" minOccurs="1"/>
</xsd:sequence>
</xsd:complexType>
<!--Cluster element-->
<xsd:complexType name="ClusterType">
<xsd:sequence>
<xsd:element name="Name" type="xsd:string"/>
<xsd:element name="NumElts" type="xsd:unsignedByte"/>
<xsd:choice minOccurs="0" maxOccurs="unbounded">
<xsd:element name="String" type="lv:StringType"/>
</xsd:choice>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
然后我从一个简单的 LabVIEW 集群发送 XML 输出:
<Cluster>
<Name>clTest</Name>
<NumElts>1</NumElts>
<String>
<Name>sTest</Name>
<Val>foo</Val>
</String>
</Cluster>
我猜这个问题与pabigot的回复有关:a similar question
在 XML Schema 中,元素和类型的命名空间是不同的,但在 Python 中却不是,
但我不太确定。我是否需要更改整个 LabView 架构中的lv:...Type以具有相同的名称和类型?
换句话说,而不是:
<xsd:element name="Cluster" type="lv:ClusterType"/>
我应该有:
<xsd:element name="Cluster" type="Cluster"/>
这将是对 LabVIEW 架构的重大更改,它始终执行此类操作。