Class: QgsExpressionNodeLiteral

class qgis.core.QgsExpressionNodeLiteral

Bases: QgsExpressionNode

An expression node for literal values.

QgsExpressionNodeLiteral(value: Any) Constructor for QgsExpressionNodeLiteral, with the specified literal value.

QgsExpressionNodeLiteral(a0: QgsExpressionNodeLiteral)

Methods

clone	rtype: Optional[QgsExpressionNode]
dump	rtype: str
evalNode	param parent:
isStatic	param parent:
nodeType	rtype: QgsExpressionNode.NodeType
prepareNode	param parent:
referencedColumns	rtype: Set[str]
referencedFunctions	rtype: Set[str]
referencedVariables	rtype: Set[str]
value	The value of the literal.
valueAsString	Returns a string representation of the node's literal value.

clone(self) → QgsExpressionNode | None

Return type:

Optional[QgsExpressionNode]

dump(self) → str

Return type:

str

evalNode(self, parent: QgsExpression | None, context: QgsExpressionContext | None) → Any

Parameters:

• parent (Optional[QgsExpression])

• context (Optional[QgsExpressionContext])

Return type:

Any

isStatic(self, parent: QgsExpression | None, context: QgsExpressionContext | None) → bool

Parameters:

• parent (Optional[QgsExpression])

• context (Optional[QgsExpressionContext])

Return type:

bool

nodeType(self) → QgsExpressionNode.NodeType

Return type:

QgsExpressionNode.NodeType

prepareNode(self, parent: QgsExpression | None, context: QgsExpressionContext | None) → bool

Parameters:

• parent (Optional[QgsExpression])

• context (Optional[QgsExpressionContext])

Return type:

bool

referencedColumns(self) → Set[str]

Return type:

Set[str]

referencedFunctions(self) → Set[str]

Return type:

Set[str]

referencedVariables(self) → Set[str]

Return type:

Set[str]

value(self) → Any

The value of the literal.

Return type:

Any

valueAsString(self) → str

Returns a string representation of the node’s literal value.

Added in version 3.20.

Return type:

str