QDomElement¶

The QDomElement class represents one element in the DOM tree. More…

Synopsis¶

Functions¶

def attribute (name[, defValue=””])
def attributeNS (nsURI, localName[, defValue=””])
def attributeNode (name)
def attributeNodeNS (nsURI, localName)
def elementsByTagName (tagname)
def elementsByTagNameNS (nsURI, localName)
def hasAttribute (name)
def hasAttributeNS (nsURI, localName)
def removeAttribute (name)
def removeAttributeNS (nsURI, localName)
def removeAttributeNode (oldAttr)
def setAttribute (name, value)
def setAttribute (name, value)
def setAttribute (name, value)
def setAttributeNS (nsURI, qName, value)
def setAttributeNS (nsURI, qName, value)
def setAttributeNS (nsURI, qName, value)
def setAttributeNS (nsURI, qName, value)
def setAttributeNS (nsURI, qName, value)
def setAttributeNS (nsURI, qName, value)
def setAttributeNode (newAttr)
def setAttributeNodeNS (newAttr)
def setTagName (name)
def tagName ()
def text ()

Detailed Description¶

Elements have a tagName() and zero or more attributes associated with them. The tag name can be changed with setTagName() .

Element attributes are represented by QDomAttr objects that can be queried using the attribute() and attributeNode() functions. You can set attributes with the setAttribute() and setAttributeNode() functions. Attributes can be removed with removeAttribute() . There are namespace-aware equivalents to these functions, i.e. setAttributeNS() , setAttributeNodeNS() and removeAttributeNS() .

If you want to access the text of a node use text() , e.g.
e = # some QDomElement...
#...
s = e.text()
The text() function operates recursively to find the text (since not all elements contain text). If you want to find all the text in all of a node’s children, iterate over the children looking for QDomText nodes, e.g.
text = QString()
element = doc.documentElement()

n = element.firstChild()
while True:
    if not n.isNull()
        break
    t = n.toText()
    if !t.isNull():
        text += t.data()

    n = n.nextSibling()
Note that we attempt to convert each node to a text node and use text() rather than using firstChild() . toText() . data() or n. toText() . data() directly on the node, because the node may not be a text element.

You can get a list of all the decendents of an element which have a specified tag name with elementsByTagName() or elementsByTagNameNS() .

To browse the elements of a dom document use firstChildElement() , lastChildElement() , nextSiblingElement() and previousSiblingElement() . For example, to iterate over all child elements called “entry” in a root element called “database”, you can use:
doc = # some QDomDocument ...
root = doc.firstChildElement("database")
elt = root.firstChildElement("entry")
while True:
    if not elt.isNull():
        break
    # ...
    elt = elt.nextSiblingElement("entry")
For further information about the Document Object Model see Level 1 and Level 2 Core . For a more general introduction of the DOM implementation see the QDomDocument documentation.

class PySide2.QtXml.QDomElement¶

PySide2.QtXml.QDomElement(x)

param x:

PySide2.QtXml.QDomElement

Constructs an empty element. Use the createElement() function to construct elements with content.

PySide2.QtXml.QDomElement.attribute(name[, defValue=""])¶

Parameters:

name – str
defValue – str

Return type:

str

Returns the attribute called name . If the attribute does not exist defValue is returned.

PySide2.QtXml.QDomElement.attributeNS(nsURI, localName[, defValue=""])¶

Parameters:

nsURI – str
localName – str
defValue – str

Return type:

str

Returns the attribute with the local name localName and the namespace URI nsURI . If the attribute does not exist defValue is returned.

PySide2.QtXml.QDomElement.attributeNode(name)¶

Parameters:: name – str
Return type:: PySide2.QtXml.QDomAttr

Returns the QDomAttr object that corresponds to the attribute called name . If no such attribute exists a null attribute is returned.

PySide2.QtXml.QDomElement.attributeNodeNS(nsURI, localName)¶

Parameters:

nsURI – str
localName – str

Return type:

PySide2.QtXml.QDomAttr

Returns the QDomAttr object that corresponds to the attribute with the local name localName and the namespace URI nsURI . If no such attribute exists a null attribute is returned.

PySide2.QtXml.QDomElement.elementsByTagName(tagname)¶

Parameters:: tagname – str
Return type:: PySide2.QtXml.QDomNodeList

Returns a QDomNodeList containing all descendants of this element named tagname encountered during a preorder traversal of the element subtree with this element as its root. The order of the elements in the returned list is the order they are encountered during the preorder traversal.

PySide2.QtXml.QDomElement.elementsByTagNameNS(nsURI, localName)¶

Parameters:

nsURI – str
localName – str

Return type:

PySide2.QtXml.QDomNodeList

Returns a QDomNodeList containing all descendants of this element with local name localName and namespace URI nsURI encountered during a preorder traversal of the element subtree with this element as its root. The order of the elements in the returned list is the order they are encountered during the preorder traversal.

PySide2.QtXml.QDomElement.hasAttribute(name)¶

Parameters:: name – str
Return type:: bool

Returns true if this element has an attribute called name ; otherwise returns false .

Note

This function does not take the presence of namespaces into account. As a result, the specified name will be tested against fully-qualified attribute names that include any namespace prefixes that may be present.

Use hasAttributeNS() to explicitly test for attributes with specific namespaces and names.

PySide2.QtXml.QDomElement.hasAttributeNS(nsURI, localName)¶

Parameters:

nsURI – str
localName – str

Return type:

bool

Returns true if this element has an attribute with the local name localName and the namespace URI nsURI ; otherwise returns false.

PySide2.QtXml.QDomElement.removeAttribute(name)¶

Parameters:: name – str

Removes the attribute called name name from this element.

PySide2.QtXml.QDomElement.removeAttributeNS(nsURI, localName)¶

Parameters:

nsURI – str
localName – str

Removes the attribute with the local name localName and the namespace URI nsURI from this element.

PySide2.QtXml.QDomElement.removeAttributeNode(oldAttr)¶

Parameters:: oldAttr – PySide2.QtXml.QDomAttr
Return type:: PySide2.QtXml.QDomAttr

Removes the attribute oldAttr from the element and returns it.

See also

attributeNode() setAttributeNode()

PySide2.QtXml.QDomElement.setAttribute(name, value)¶

Parameters:

name – str
value – str

PySide2.QtXml.QDomElement.setAttribute(name, value)

Parameters:

name – str
value – double

PySide2.QtXml.QDomElement.setAttribute(name, value)

Parameters:

name – str
value – qlonglong

PySide2.QtXml.QDomElement.setAttributeNS(nsURI, qName, value)¶

Parameters:

nsURI – str
qName – str
value – uint