QDomNamedNodeMap ¶

概要 ¶

详细描述 ¶

注意： QDomNamedNodeMap does not inherit from QDomNodeList . QDomNamedNodeMaps do not provide any specific node ordering. Although nodes in a QDomNamedNodeMap may be accessed by an ordinal index, this is simply to allow a convenient enumeration of the contents of a QDomNamedNodeMap , and does not imply that the DOM specifies an ordering of the nodes.

QDomNamedNodeMap is used in three places:

1. entities() returns a map of all entities described in the DTD.

2. notations() returns a map of all notations described in the DTD.

3. attributes() returns a map of all attributes of an element.

Items in the map are identified by the name which QDomNode::name() returns. Nodes are retrieved using namedItem() , namedItemNS() or item() . New nodes are inserted with setNamedItem() or setNamedItemNS() and removed with removeNamedItem() or removeNamedItemNS() 。使用 contains() to see if an item with the given name is in the named node map. The number of items is returned by length() .

Terminology: in this class we use “item” and “node” interchangeably.

class QDomNamedNodeMap ¶

QDomNamedNodeMap(arg__1)

param arg__1

QDomNamedNodeMap

Constructs an empty named node map.

PySide2.QtXml.QDomNamedNodeMap. contains ( name ) ¶

参数

name – unicode

返回类型

bool

返回 true if the map contains a node called name ；否则返回 false .

注意

This function does not take the presence of namespaces into account. Use namedItemNS() to test whether the map contains a node with a specific namespace URI and name.

PySide2.QtXml.QDomNamedNodeMap. count ( ) ¶

返回类型

int

提供此函数是为 Qt API 一致性。它相当于 length() .

PySide2.QtXml.QDomNamedNodeMap. isEmpty ( ) ¶

返回类型

bool

返回 true if the map is empty; otherwise returns false . This function is provided for Qt API consistency.

PySide2.QtXml.QDomNamedNodeMap. item ( index ) ¶

参数

index – int

返回类型

QDomNode

Retrieves the node at position index .

This can be used to iterate over the map. Note that the nodes in the map are ordered arbitrarily.

另请参阅

length()

PySide2.QtXml.QDomNamedNodeMap. length ( ) ¶

返回类型

int

Returns the number of nodes in the map.

另请参阅

item()

PySide2.QtXml.QDomNamedNodeMap. namedItem ( name ) ¶

参数

name – unicode

返回类型

QDomNode

Returns the node called name .

If the named node map does not contain such a node, a null node is returned. A node’s name is the name returned by nodeName() .

另请参阅

setNamedItem() namedItemNS()

PySide2.QtXml.QDomNamedNodeMap. namedItemNS ( nsURI , localName ) ¶

参数

• nsURI – unicode

• localName – unicode

返回类型

QDomNode

Returns the node associated with the local name localName 和名称空间 URI nsURI .

If the map does not contain such a node, a null node 被返回。

另请参阅

setNamedItemNS() namedItem()

PySide2.QtXml.QDomNamedNodeMap. __ne__ ( arg__1 ) ¶

参数

arg__1 – QDomNamedNodeMap

返回类型

bool

返回 true if n and this named node map are not equal; otherwise returns false .

PySide2.QtXml.QDomNamedNodeMap. __eq__ ( arg__1 ) ¶

参数

arg__1 – QDomNamedNodeMap

返回类型

bool

返回 true if n and this named node map are equal; otherwise returns false .

PySide2.QtXml.QDomNamedNodeMap. removeNamedItem ( name ) ¶

参数

name – unicode

返回类型

QDomNode

Removes the node called name from the map.

The function returns the removed node or a null node if the map did not contain a node called name .

另请参阅

setNamedItem() namedItem() removeNamedItemNS()

PySide2.QtXml.QDomNamedNodeMap. removeNamedItemNS ( nsURI , localName ) ¶

参数

• nsURI – unicode

• localName – unicode

返回类型

QDomNode

Removes the node with the local name localName 和名称空间 URI nsURI from the map.

The function returns the removed node or a null node if the map did not contain a node with the local name localName 和名称空间 URI nsURI .

另请参阅

setNamedItemNS() namedItemNS() removeNamedItem()

PySide2.QtXml.QDomNamedNodeMap. setNamedItem ( newNode ) ¶

参数

newNode – QDomNode

返回类型

QDomNode

插入节点 newNode into the named node map. The name used by the map is the node name of newNode as returned by nodeName() .

If the new node replaces an existing node, i.e. the map contains a node with the same name, the replaced node is returned.

另请参阅

namedItem() removeNamedItem() setNamedItemNS()

PySide2.QtXml.QDomNamedNodeMap. setNamedItemNS ( newNode ) ¶

参数

newNode – QDomNode

返回类型

QDomNode

插入节点 newNode in the map. If a node with the same namespace URI and the same local name already exists in the map, it is replaced by newNode . If the new node replaces an existing node, the replaced node is returned.

另请参阅

namedItemNS() removeNamedItemNS() setNamedItem()

PySide2.QtXml.QDomNamedNodeMap. size ( ) ¶

返回类型

int

提供此函数是为 Qt API 一致性。它相当于 length() .